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Anonymous asked in Education & ReferenceHomework Help · 7 years ago

Algebra substitution question. please exlain?

Click link for problem: http://imgur.com/dBk9WY0

I knew to make it easier for myself and say b instead of b1 and c instead of b2. & then something about dividing h. But I'm confused.

1 Answer

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  • 7 years ago
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    A = ((1/2)h)(b1 + b2)

    Distributivity:

    A = hb1/2 + hb2/2

    Multiply both sides by 2:

    2A = hb1 + hb2

    Bring b2 to the left side:

    2A - hb2 = hb1

    Divide both sides by h:

    (2A - hb2)/h = b1

    Hope this helped!

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