Question

Calcule a equação por favor
-2x+y=7
X + 3y = 0

Answer 1

$[tex] - 2x + y = 7 \\ - 2x = - 7 + y \times ( - 1) \\ 2x = - 7 + y \\ x = \frac{ - 7 + y}{2} \\ x = \frac{ - 7 + 0}{2} \\ x = \frac{ - 7}{2} \\ x = - 3.5$

$x + 3y = 0 \\ \frac{ - 7 + y}{2} + 3y = 0 \\ \frac{7y + 6y = 0}{2} \\ - 7y + 6y = 0 \\ - y = 0 \times ( - 1) \\ y = 0$