Question

2x+2y=10 and -5x-7y=-45 by combining the equations.

Answer 1

Answer:

$x = - \frac{5}{6} \\ \\ y = \frac{35}{6 }$

Step-by-step explanation:

$2x + 2y = 10 \\ - 5x - 7y = - 45 \\ \\ x = 5 - y \\ 5x - 7 y = - 45 \\ \\ \\ = 5(5 - y) - 7y = - 45 \\ \\ y = \frac{35}{6} \\ \\ x = 5 - \frac{35}{6} \\ \\ x = - \frac{5}{6}$