Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 6 - Systems of Equations and Inequalities - 6-3 Solving Systems Using Elimination - Lesson Check - Page 377: 6


The best way to solve a system of equations using elimination is to have one variable with coefficients that have a sum or difference of zero.

Work Step by Step

Example: $x+y = 4$ $2x-y = 8$ Adding the equations together yields $3x = 12$ (eliminating the $y$ in both equations). $3x=12$ $3x/3 = 12/3$ $x=4$ $4+ y = 4$ $y=0$
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