Question 186448
6x-7y=21 
3x+7y=6 
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Add to get:
9x = 27
x = 3
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Substitute into 6x-7y=21 to solve for "y":
6(3) - 7y = 21
18 -7y = 21
7y = -3
y = -3/7
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Cheers,
Stan H.