Big Ideas Math - Algebra 1, A Common Core Curriculum

Published by Big Ideas Learning LLC
ISBN 10: 978-1-60840-838-2
ISBN 13: 978-1-60840-838-2

Chapter 5 - Solving Systems of Linear Equations - 5.1 - Solving Systems of Linear Equations by Graphing - Exercises - Page 239: 18

Answer

The solution is $(0,-5)$.

Work Step by Step

The given system of linear equation is $4x-4y=20$ ...... (1) $y=-5$ ...... (2) Graph each equation. The intersection point is $(0,-5)$. Check the intersection point. Equation 1: $\Rightarrow 4x-4y=20$ $\Rightarrow 4(0)-4(-5)=20$ $\Rightarrow 0+20=20$ $\Rightarrow 20=20$ True. Equation 2: $\Rightarrow y=-5$ $\Rightarrow -5=-5$ True. The solution is $(0,-5)$.
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