Introductory Algebra for College Students (7th Edition)

Published by Pearson
ISBN 10: 0-13417-805-X
ISBN 13: 978-0-13417-805-9

Chapter 1 - Section 1.2 - Fractions in Algebra - Exercise Set: 109

Answer

$\frac{x}{7}$ + $\frac{x}{8}$ = 12

Work Step by Step

The sum of $\frac{1}{7}$ of a number and $\frac{1}{8}$ of that number gives 12. let the number be x " $\frac{1}{7}$ of a number" = $\frac{1}{7}$x = $\frac{x}{7}$ "$\frac{1}{8}$ of that number" = $\frac{1}{8}$x = $\frac{x}{8}$ The sum of $\frac{1}{7}$ of a number and $\frac{1}{8}$ of that number = $\frac{1}{7}$x + $\frac{1}{8}$x On the right hand side we have 12 $\frac{x}{7}$ + $\frac{x}{8}$ = 12
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