Algebra 1: Common Core (15th Edition)

Published by Prentice Hall
ISBN 10: 0133281140
ISBN 13: 978-0-13328-114-9

Chapter 6 - Systems of Equations and Inequalities - 6-2 Solving Systems Using Substitution - Practice and Problem-Solving Exercises - Page 376: 33


The first step in solving the system is finding that $y=2-1.2x$ (explained in detail below).

Work Step by Step

The first step is to select one of the equations, which we solve for one of the variables. To avoid fractions in this first step, we search for a variable with a coefficient 1 or -1. In this case, the variable y in the first equation would be our choice, as its coefficient is $1.$ So, the first step in solving the system is finding that $y=2-1.2x$ In the next step, $y$ would be substituted with $2-1.2x$
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