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Question

For solving each pair of equations, use the method of eliminations by equating coefficients:

xy6=2(4x)

2x+y=3(x4)


Solution

xy6=2(4x)xy=12(4x)xy=4812x12x+xy=4813xy=48(1)2x+y=3(x4)2x+y=3x122x3x+y=12x+y=12xy=12(2)multiply (2) by 1313x13y=156(3)13xy=48(1)(3)(1)12y=108y=9Put value of y in (2)xy=12x+9=12x=3


Mathematics
Concise Mathematics
Standard IX

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