Answer
$x=-15$
Work Step by Step
$\frac{-3}{8}$=$\frac{x}{40}$
Step 1: Cross Multiply
$8\times x$=$-3\times40$
$8x=-120$
Step 2: Divide by 8 on both sides
$8x\div8$=$-120\div8$
$x=-15$
Answer: $x=-15$
Thinking Mathematically (6th Edition)
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0321867327
ISBN 13:
978-0-32186-732-2
Chapter 6 - Algebra: Equations and Inequalities - 6.2 Linear Equations in One Variable and Proportions - Exercise Set 6.2 - Page 362: 63
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