Question

A=115+1/2(p+s) solve for s

Answer 1

A = 115 + 1/2 (p + s)

you subtract 115 from both sides, and you get

A - 115 = 1/2 (p + s) 

now you multiply by 2 on both sides, and you get

(A - 115) * 2 = p + s            NOTE: I DISTRIBUTED 2 IN THE FOLLOWING EQUATION

now you subtract p on both sides to get s by itself and you get

2A - 230 - p = s

so the final answer is .......

$s=2A-230-p$

Answer 2

A = 115 + 1/2(p + s)
2(A - 115) = p + s
2(A - 115) - p = s