Chapter 11 - Systems of Equations and Inequalities - 11.1 Systems of Linear Equations: Substitution and Elimination - 11.1 Assess Your Understanding - Page 715: 9

We can verify the equations by substituting in the given $x=2$ and $y=-1$ values and then check if the equalities still hold. Here: $2x-y=2\cdot2-(-1)=4+1=5$, which is correct. $5x+2y=5\cdot2+2\cdot(-1)=10-2=8$, which is correct.

Work Step by Step

We can verify the equations by substituting in the given $x=2$ and $y=-1$ values and then check if the equalities still hold. Here: $2x-y=2\cdot2-(-1)=4+1=5$, which is correct. $5x+2y=5\cdot2+2\cdot(-1)=10-2=8$, which is correct.

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