Yahoo Answers: Answers and Comments for How do I solve this Algebra problem? [Mathematics]
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From Erin M
enUS
Fri, 06 Feb 2009 18:03:54 +0000
3
Yahoo Answers: Answers and Comments for How do I solve this Algebra problem? [Mathematics]
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From Lucy: The answer definitely does not include decimal...
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Fri, 06 Feb 2009 18:10:37 +0000
The answer definitely does not include decimals. Here is how you do it:
Given:
11y  3x = 18
3x = 16y + 33
First, write both of these equations so that the variables line up with each other.
3x + 11y = 18
3x + 16y = 33
Multiply the first one by 1.
1(3x + 11y) = 1(18)
1(3x + 11y) = 18
Distribute.
1(3x)  1(11y) = 18
3x  11y = 18
Your two equations are now.
3x  11y = 18
3x + 16y = 33
Add them together.
3x  11y = 18
3x + 16y = 33

5y = 15
Divide both sides by 5.
5y / 5 = 15 / 5
y = 3
Plug this back into one of the equations and solve for x.
3x = 16y + 33
3x = 16(3) + 33
3x = 48 + 33
3x = 15
3x / 3 = 15 / 3
x = 5
ANSWER: (5, 3)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
CHECK:
You can always check your answer by plugging in the values you found back into the original equations to find out if both sides equal each other.
11y  3x = 18
11(3)  3(5) = 18?
33  15 = 18?
18 = 18?
true
3x = 16y + 33
3(5) = 16(3) + 33?
15 = 48 + 33?
15 = 15?
true

From Anonymous: 3x + 11y = 18
3x  16y = 33
add both sid...
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Fri, 06 Feb 2009 18:09:53 +0000
3x + 11y = 18
3x  16y = 33
add both sides
5y = 15
y = 3
3x + 11(3) = 18
3x = 18  33
3x = 15
x = 5

From Arno b: STEP 1:
make the second equation equal to x. ...
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Fri, 06 Feb 2009 18:09:33 +0000
STEP 1:
make the second equation equal to x. so you should end up with "x= and whatever it is"
STEP 2:
get what you get equals X and substitute the X in the top equation with it
STEP3:
Once you get Y by doing the previous step, substitute the Y in the bottom equation with what Y equals from the top equation

From Grampedo: 11y3x=18..............Eq.1
3x= 16y+33........
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Fri, 06 Feb 2009 18:15:55 +0000
11y3x=18..............Eq.1
3x= 16y+33..........Eq.2
Reorganize both equations
3x+11y=18............Eq.1
3x+16y=33............Eq.2
3x+11y= 18...........Eq.1
3x16y= 33...........Eq.2 X 1
 Add
5y=15
5y=15
y=3
Substitute 3 for y in either original equation.
I'll use 3x+11y= 18
3x+11(3)=18
3x+33=18
3x=1833
3x=15
3x=15
x=5
Solution is x=5, y=3

From heyitsamerica: heres how u solve. put all numbers and variabl...
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Fri, 06 Feb 2009 18:14:34 +0000
heres how u solve. put all numbers and variables aligned like this:
16y3x=33
11y3x=33
make sure u cancel one of them out. multiply one of them by 1.
16y3x=33
11y+3x=33
16y11y=5y. x's cancel and so do the regular numbers.
5y=0
plug y in.
16(0)3x=33
3x=33
x=11
so the answer is (11,0)

From Huh: Uh go to webmath.com it like explains how to d...
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Fri, 06 Feb 2009 18:12:22 +0000
Uh go to webmath.com it like explains how to do the problem and how to get the answer.

From Dave aka Spider Monkey: 11y3x=18
16y3x=33
11y3x=18
16y+3x=33...
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Fri, 06 Feb 2009 18:11:59 +0000
11y3x=18
16y3x=33
11y3x=18
16y+3x=33

5y=15
y=3
if y=3 then x=5
333x=18
3x=15
x=5

From Anonymous: OK. You first want to solve for a variable in ...
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Fri, 06 Feb 2009 18:11:08 +0000
OK. You first want to solve for a variable in the first equation. Either X or Y. You get everything on one side equal to That variable. Then plug it into the 2nd equation. Whatever was on the other side you will plug into the variable you solved for. There should only be one variable in your equation. Then you solve for that variable. Then plug that into the original first equation.

From Amy Brown: Well the equation for a slope is y=mx+b. so fi...
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Fri, 06 Feb 2009 18:10:54 +0000
Well the equation for a slope is y=mx+b. so first off get it to this point by rearranging the equation. b is the plain old number. nothing special about it. the mx part is the x and the m which is the coefficient. so for example 5x would = mx because the 5 is the coefficient. and y is...y. So for the first one you add 3x to both sides and you get 11y=3x+18. Hope I could help.

From jimschem: 11y3x=18
or
3x = 11y+18
3x= 16y+33
...
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Fri, 06 Feb 2009 18:10:35 +0000
11y3x=18
or
3x = 11y+18
3x= 16y+33
Now
11y+18 = 16y+33
5y = 15
y = 3
Substitute:
x = 5

From erna: B/2=7+B or 2B/2=2(7+B) or B=14+2B or B2B=...
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Sun, 29 May 2016 14:51:44 +0000
B/2=7+B or 2B/2=2(7+B) or B=14+2B or B2B=14+2B2B or B=14 Or B=14 ans

From Anonymous: actually you could use the addition by subtrac...
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Fri, 06 Feb 2009 18:36:04 +0000
actually you could use the addition by subtraction method
11y3x=18
3x= 16y+33
3x+11y=18
3x +16y=33
+ 3x+11y=18
( ) 3x 16y=33
5y=15
5 5
y= 3
then substitute to get the value of x
3x= 16y+33
3x= 16(3)+33
3x= 48+33
3x=15
3 3
x=5
i would make additional information later i still have my class.. hang on there.. God bless

From h4yl3y: 11y3(16y+33)=18
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Fri, 06 Feb 2009 18:08:59 +0000
11y3(16y+33)=18

From Stephen Y: reorganize and solve
3x=16y+33 becomes 16y...
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Fri, 06 Feb 2009 18:08:38 +0000
reorganize and solve
3x=16y+33 becomes 16y 3x = 33
subtract second from first to change sign
11y3x = 18
16y3x = 33 subtract
_______________
5y = 15
y = 15/5 = 3
substitute back into the equations
3X = 16(3) + 33
3X = 48 + 33
3x = 15
x = 5
check 11(3)  3(5) = 18
33 15 = 18
18 = 18
3(5) =  16(3) + 33
15 = 48 + 33 = 15

From Anonymous: sorry dude but im in prealgebra but ill get m...
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Fri, 06 Feb 2009 18:07:26 +0000
sorry dude but im in prealgebra but ill get my teacher to help out