Solve for b. A=1/2h(b+c)

a.) b= 2a/h-c
b.) b= a-c/2h
c.) b= 2a-c/h
d.) b= 2(a-c)/h

A.) b= 2a/h-c

1/2h(b+c)= A

2×1/2h(b+c)=A×2

h(b+c)=2A

h÷h(b+c)=2A÷h

b+c=2A/h

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

b=2A/h-c

I hope this is good enough:

yeah i know the problem you need. i am taking it right now. the answer is step 3

~mickey

нιѕ яαтє ιѕ 1/4 σя .25 ριєѕ ρєя мιиυтє

нσρє ι ¢συℓ∂ нєℓρ уσυ.