Introductory Algebra for College Students (7th Edition)

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

Chapter 4 - Section 4.2 - Solving Systems of Linear Equations by the Substitution Method - Exercise Set - Page 302: 63


$$-4x + 20y = -12$$

Work Step by Step

Let us write the equation to include multiplying both sides by $-4$: $$-4(x - 5y) = -4(3)$$ Let's use distributive property to get rid of the parentheses: $$(-4)(x) - (4)(-5y) = -4(3)$$ Let's multiply out the terms: $$-4x + 20y = -12$$
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