Answer
I) $18$
Work Step by Step
Substitute $b$ in the first equation with the second
$a+2=2a-16$
Subtract $2a$ and $-2$ from both sides
$-a=-18$
Multiply the equation by $-1$
$a=18$
Algebra 1
by Hall, Prentice
Published by
Prentice Hall
ISBN 10:
0133500403
ISBN 13:
978-0-13350-040-0
Chapter 8 - Polynomials and Factoring - Cumulative Test Prep - Multiple Choice - Page 528: 2
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