Question

Solve A = a + b /2 for b

Answer 1

A = a+b/2

*subtract a from both sides*

A-a =b/2

*multiply both sides by 2*

2(A-a)=b

*distribute*

b=2A-2a

Answer 2

b=2A-2a

Explanation:

First you subtract a to the other side.

Then you divide by 2.

SO it will be b=2A-2a which is your answer