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In the following exercises, solve the systems of equations by substitution. $\left\{\begin{array}{l}2 x-16 y=8 \\ -x-8 y=-4\end{array}\right.$

   In the following exercises, solve the systems of equations by substitution.
$\left\{\begin{array}{l}2 x-16 y=8 \\ -x-8 y=-4\end{array}\right.$
Intermediate Algebra
Intermediate Algebra
Lynn Marecek 1st Edition
Chapter 4, Problem 43 ↓
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In the following exercises, solve the systems of equations by substitution. $\left\{\begin{array}{l}2 x-16 y=8 \\ -x-8 y=-4\end{array}\right.$
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Transcript

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00:01 We need to solve the system using substitution.
00:03 So we're going to use the second equation and solve for x.
00:08 So we have negative x.
00:14 Negative x minus 8y is equal to negative 4.
00:18 We're going to move the 8y over.
00:22 We get negative x is equal to 8y minus 4.
00:26 We're going to multiply everything by negative 1...
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