Question

Solve for b in the formula A = 1/2h(B+b)

Answer 1

A=1/2h(B+b)

cross multiply

2A=h(B+b)

divide both sides by h

2A/h=h/h(B+b)

2A/h=(B+b)

open the bracket

2A/h=B+b

subtract B from both sides

2A/h-B=B-B+b

2A/h-B=b

.: b=2A/h-B.

Answer 2

Answer:
`(2A)/(H) -B`

Explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.