SOLUTION: if 12x+13y=29 and 13x+12y=21,then find x-y

SOLUTION: if 12x+13y=29 and 13x+12y=21,then find x-y

Algebra.Com

Question 1105648: if 12x+13y=29 and 13x+12y=21,then find x-y
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!

Any clever way to get to ?

----------yes, this way

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This would not be necessary:

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