SOMEONE HELP! i’ll mark as brainliest!!

Answer:
b1= 2A/h - b2
Step-by-step explanation:
You have to multiply each side by 2, then divide each side by h. after that you subtract b1 from both sides and then you will get your answer.
Answer:
b1 = 2A / h - b2
Step-by-step explanation:
A = h(b1 + b2) / 2
[cross multiply]
h(b1 + b2) = A × 2
b1h + b2h = 2A
[divide both sides of the equation by h]
b1h / h + b2h / h = 2A / h
b1 + b2 = 2A / h
[make b1 the subject of the formula]
b1 = 2A / h - b2