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7a-5=2a-20?

equation

asked Mar 29, 2013 in ALGEBRA 1 by linda Scholar

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1 Answer

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7a - 5 = 2a - 20

Add 5 to each side

7a - 5 + 5 = 2a - 20 + 5

Simplify

7a - 0 = 2a -15

7a = 2a - 15

Subtract 2a from each side

7a - 2a = 2a - 15 -2a

Simplify

5a = 0 - 15

5a = -15

Divide each side by 5

5a / 5 = -15 / 5

Simplify

a = -3.

answered Mar 30, 2013 by diane Scholar

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