Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 3 - Section 3.3 - Solving Linear Equations in One Variable - Exercise Set: 1

Answer

The solution is -12

Work Step by Step

3x-7 =4x+5 Add 7 to both sides of the equation 3x-7 + 7=7=4x+5 +7 Simplify 3x =4x + 12 Subtract 4x from both sides 3x -4x =4x + 12 -4x Simplify -x = 12 Divide both sides by -1 $\frac{-x}{-1}$ = $\frac{12}{-1}$ x = -12 The solution is -12 Check 3x-7 =4x+5 3(-12) -7 =4(-12)+5 Multiply -36-7= -48 +5 -43=-43
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