SOLUTION: Solve the indicated variable. Area of a Trapezoid Solve for b1: A= 1/2h(b1 + b2)

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Question 72686: Solve the indicated variable.
Area of a Trapezoid
Solve for b1:
A= 1/2h(b1 + b2)
Answer by Earlsdon(6103) About Me  (Show Source):
You can put this solution on YOUR website!
Solve for b%5B1%5D
A+=+%281%2F2%29h%28b%5B1%5D%2Bb%5B2%5D%29 Multiply both sides by 2.
2A+=+h%28b%5B1%5D%2Bb%5B2%5D%29 Divide both sides by h.
2A%2Fh+=+b%5B1%5D%2Bb%5B2%5D Finally, subtract b%5B2%5D from both sides.
2A%2Fh+-+b%5B2%5D+=+b%5B1%5D
The answer:
b%5B1%5D+=+2A%2Fh+-+b%5B2%5D