-7a-10=20-3a please show work help

1 answer:

7 0

$-7a-10=20-3a$

Combine like terms:
$-4a -10 = 20$
$-4a = 30$

Solve for a:
$a = -\frac{30}{4} = -7.5$

Your answer: a = -7.5

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