Anonymous

# Help with math equation!!!!!!!!?

Help! I dont understand how to do these math equations......31= -2-3y .

how would you do this..?..and also 110-9u=2..please explain

Relevance

31=-2 - 3y

start by adding 2 to both sides:

33=-3y

now divide both sides by -3:

-11 = y

110-9u = 2

start by subtracting 110 from both sides:

-9u = -108

now divide both sides by -9

u = 12

Hope I helped!

• Anonymous

31=-2-3Y

you want to solve for Y

31=-2-3Y

+2 +2 you want to add this 2 to get the Y (variable) alone

33/ = -3Y/ answer from step 1, now divide each side by -3 -3 -3 to get the Y alone again

problem 2

110-9u=2

-110 -110

-9u/-9 = -108/-9

u = 12

• Pretty simple.

31 = -2 - 3y

31+2 = -3y (Moved the -2 to the other side and now it's positive)

33 = -3y (The result of adding the 2)

33/-3 = y (The / is a division sign but anyways 33 divided by -3)

-11 = y (It's -11 and that's y!)

110 - 9u = 2

110 - 2 = 9u (Moved 2 and it becomes negative and 9u moves and becomes positive)

108 = 9u (The result of 110 - 2)

108/9 = u (108 divided by 9)

12 = u (12 is the result)

Hope it helps.

• Ok for the first one, 31=-2-3y

Add -2 to both sides so it would be 33=-3y

Now divide both sides by -3, so 33/-3=-11

y=-11

Second one:

110-9u=2

2-110=-108

-9u=-108

Divide both sides by -9

u=12

Source(s): My Brain
• 31 = -2 - 3y

31 + 2 = -3y

y = 33/-3 = -11

110 - 9u = 2

9u = 110 - 2 = 108

u = 108/9

u = 12

• 31 = -2 - 3y

33 = -3y

divide both sides by -3

-11 = y

similar for the other equations.

• 31= -2-3y (add 2 to both sides to cancel the negative 2)

33 = -3y (divide both sides by -3)

-11=y

Same process on the second one. Try it out so you get the practice.

• first, you want to get the like terms on the same side.

31= -2-3y

33 = -3y

divide each side by -3.

-11 = y would be your final answer. i hope i explained enough. :P

try the next one on your own. ;]

• Anonymous

31=-2-3y

+2 +2

--------------

33=-3y

--------------

y=-11

110-9u=2

-110 -110

-------------------

-9u=-108

---------------

u=12

• add/subtract terms so that the term with the variable is on one side by itself. then divide both sides by the coefficient of the variable. simplify and solve.