Answer: [tex]\frac{2A}{H} -B[/tex]
Step-by-step explanation:
Isolate the variable by dividing each side by factors that don't contain the variable.
Answer:
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.