Algebra 2 (1st Edition)

Published by McDougal Littell
ISBN 10: 0618595414
ISBN 13: 978-0-61859-541-9

Chapter 1, Equations and Inequalities - 1.3 Solve Linear Equations - Guided Practice for Examples 3,4, and 5 - Page 21: 5



Work Step by Step

$-2x+9=2x-7$ First we move the +9 and+2x to the other side of the equation to isolate the "x" on one side. Moving the +9 and +2x will cause them to become negative. $-4x=-16 /\times(-1)$ $4x=16$ Then we will divide the equation by 4 so we could get the value of the single "x" $4x=16 /:7$ $\frac{4}{4}x=\frac{16}{4}$ $x=4$ We can also check if our result is correct by substituting our "x" in the original equation... $-2\times4+9=2\times4-7$ $-8+9=8-7$ $1=1$
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