Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 2 - Solving Equations - 2-2 Solving Two-Step Equations - Practice and Problem-Solving Exercises: 30

Answer

$x=12$

Work Step by Step

We need to get the x alone. In order to cancel out division, we use multiplication, so we multiply both sides by 2 to get that $x+3=15$. We now cancel out the addition by subtracting 3 on both sides, giving us a final answer of $x=12$. We plug 12 in for x and confirm that our answer is, indeed, correct.
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