Respuesta:
7x+8y=−8
7x+8y+−8y=−8+−8y
7x=−8y−8
[tex]\frac{7x}{7} = \frac{-8y-8}{7}\\ \\ x= \frac{-8}{7}y+\frac{-8}{7}[/tex]
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7x+6y=8
7x+6y+−6y=8+−6y
7x=−6y+8
[tex]\frac{7x}{7} = \frac{-6y+8}{7}\\ \\x= \frac{-6}{7}y +\frac{8}{7}[/tex]
