Question

Solve for b, then find the value of b when a = 3:
4a = 2b - 7

a.) -9/2
b.) 5/2
c.) 19/2
d.) 17

Answer 1

4a=2b-7

in order to solve for the b you have to isolate it to one side.

Answer 2

first you try to move the -7 to the left side.

Answer 3

which will give you 4a-7=2b

Answer 4

I mean 4a+7=2b

Answer 5

because you add seven the right side to make it a 0. What you do for the right you also must do to the left.

Answer 6

Now you only have to do one more thing to get b on its own.