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OpenStudy (anonymous):
so stuck, please help 2x-4y=12 3x-6y=21
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OpenStudy (cwrw238):
use elimination for this one multiply first equation by 3 and second equation by -2 then adding these will eliminate x
OpenStudy (anonymous):
i thought about this but it cancels out y as well
OpenStudy (anonymous):
so 6x-12y=36 and 6x-12y=42?
OpenStudy (anonymous):
:)??
OpenStudy (anonymous):
well the bottome one needs to be negative
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