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 1.4 - Basic Rules of Algebra - Exercise Set - Page 54: 69


$12x-3x,$ simplifies to $9x$

Work Step by Step

"the product of three and a number" $\rightarrow 3x$ is subtracted from "the product of 12 and a number" $\rightarrow 12x$ So, 3x is subtracted from 12x:$ \quad 12x-3x$ Combine like terms by combining the coefficients of the terms and keeping the same variable factor. $12x-3x=\qquad 9x$
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