EDGE Math 8

Solve each system of linear equations. Choose the correct answer.

1.	${\begin{array}{l} 7 x + 2 y = - 1 \\ 2 x + y = 4 \end{array}$

(3, −11)

(−3, 10)

(3, −2)

none of the choices

Answer: (−3, 10)

2.	${\begin{array}{l} 4 x + 3 y = 2 \\ 2 x - 5 y = 14 \end{array}$

(−2, −2)

(−1, 2)

(2, 2)

none of the choices

Answer: none of the options; (2, −2)

3.	${\begin{array}{l} 3 x - 4 y = - 2 \\ 4 x - 6 y = - 3 \end{array}$

(\frac{1}{2}, 0)

(- \frac{2}{3}, 0)

(- \frac{3}{4}, 0)

none of the choices

Answer: none of the options; $(0, \frac{1}{2})$

4.	${\begin{array}{l} 2 x + 9 y = 15 \\ 5 x + 3 y = - 21 \end{array}$

(3, 1)

(−6, 3)

(12, −1)

none of the choices

Answer: (−6, 3)

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