9th grade algebra

solve for h

The formula for finding the area of a trapezoid is
A = 1/2 (b1 + b 2)h where A represents the area
of the trapezoid, b1 and b2 are bases, and h represents the height. Solve the formula for h.

I know the answer is
h =

2A/b1 + b2

but I don't understand why...can you explain step by step

I tried dividing b1 + b2 from both sides..i just don't know..please and thank you

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  1. The b1+b2 quantity is just a number, like any other. You can divide by it, just like you divide by the 1/2...

    1/2 (b1 + b 2)h = A
    (b1+b2)h = 2A
    h = 2A/(b1+b2)

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  2. 2a/b=h

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  3. U guys did not

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