# Chapter 1 - Systems of Linear Equations - Review Exercises - Page 35: 18

$x$ = -3 , $y$ = 7

#### Work Step by Step

3$y$ = 15 - 2$x$ $y$ = 5 -$\frac{2}{3}x$ $\frac{1}{3}x$ + $\frac{4}{7}$(5-$\frac{2}{3}x$) = 3 $\frac{1}{3}x$ + $\frac{20}{7}$ - $\frac{8}{21}x$ = 3 - $\frac{1}{21}x$ = $\frac{1}{7}$ $x$ = -3 $y$ = 5 - $\frac{2}{3}$(-3) $y$ = 5 + 2 $y$ = 7

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