The only ones I can't Get, math problems?
find x & y
these were the only ones i couldn't get. i got a lot of fractions but when i checked the problems it didn't work. so lets see if what you got matches mt answers.
- Anonymous1 decade agoFavorite Answer
what grade are you in?
im in 9th grade math but rly 10th grade...
i think im learning this now...
-6(3x-6y=1) + -18x+36y=-6
when it doesn't say either x= or y= you have to multiply to find the answerr but in this case it wroks out like shyt so IDFK, but i tried
- Anonymous1 decade ago
instead of solving all of these, i will do the 'first' one, so that you get the idea :)
so first you have x + y = -3 which can be rearranged to
x = -3 - y
the second equation you were give nwas -13x - 17y = 15
now all you need to do is variable substitution.
since x = -3 - y, sub that x value into the second equation. this gives you:
-13 (-3 - y) - 17y = 15
0 = 39 + 13y - 17y - 15
0 = -4y + 24
4y = 24
**y = 6** and you already know that x = -3 - y
therefore, x = -3 - (6)
therefore (x,y) = (-9, 6) hope this helps ^_^
- 1 decade ago
For the first just find what x is and and placxe that value into the first equation... answers x = -3 and y= 10/6