Question 176914
5x-12y=4 
4x-7y=-2
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coefficient determinant: (5*-7) - (-12)*4 = -35 + 48 = 13
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x-coefficient determinant: (4*-7) - (-12*-2) = -28 -24 = -52
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y-coefficient determinant: (5*-2) - (4*4) = -10-16 = -26
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Solution: x = -52/13 = -4 ; y = -26/13 = -2
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Cheers,
Stan H.