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 - 6-1 Solving Systems by Graphing - Practice and Problem-Solving Exercises: 13

Answer

(2, -2)

Work Step by Step

You can find the point of intersection two ways; one by graphing and finding where the lines intersect or by setting the equations equal to each other. We use the second method: $x - 4 = -x$ (subtract x from both sides) $-4 = -2x$ (then divide each side by -2) $x= 2$ Then, we plug this in to one of the equations to get y: $y= -2$
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