Respuesta :

Ax + By = C:
a. -2x + y =7, 2x - y = -7
b. 3y + y = 8
y = mx + b:
a. -4y = -3x + 12, y = 3/4 - 3
b. 3y = 6x + 9, y = 2x + 3
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Hope this helps!
==jding713==