Prealgebra (7th Edition)

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

Chapter 5 - Section 5.6 - Solving Equations Containing Decimals - Exercise Set: 19

Answer

x = 10

Work Step by Step

2.1x +5 -1.6x =10 Simplify 2.1x -1.6x 0.5x +5 =10 Subtract 5 from both sides 0.5x +5-5 =10 -5 0.5x =5 Divide by 0.5 on both sides $\frac{0.5x}{0.5}$=$\frac{5}{0.5}$ x=$\frac{50}{5}$ x=10 The solution is 10 Check 2,1x +5 -1.6x =10 Replace x with $\frac{1}{10}$ 2,1$\times$10 +5 -1.6$\times$10 =10 21+5 -16=10 26-5=10 10=10
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