Respuesta :

Anonymouslizard

Step-by-step explanation:

1) -7x-8y=-3

-7x-8y=-3: -[tex]\frac{-3+7x}{8}[/tex]

2) -3x-7y=-12

-3x-7y=-12: y=[tex]\frac{-12+3x}{7}[/tex]