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Mathematics 8 Online
OpenStudy (anonymous):

ey

OpenStudy (austinl):

A would cancel out the x variable. B would cancel out the x variable. C would give. 8x - 12y = -4 9x - 12y = -9 Which does nothing. So, A&B work. Which leads me to believe that there may be a typo in your option C.

OpenStudy (anonymous):

It is D Because all work here.

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