Answer
b= $\frac{a+10}{2}$
Work Step by Step
First, add 2b to both sides to get:
a=-10 +2b
Next, add 10 to both sides to get b by itself to get:
a+10=2b
After that, divide both sides by 2 to get rid of the coefficient in front of b.
This final step gives us our answer.
