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2x - 5y = 1
4x - 3y = -5
4x - 10y = 2
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0 7y = -7
y = -1
4x +3 = -5
4x = -8
x = -2
4x - 3y = -5 ( dikali 1)
diperoleh : 4x - 10y = 2
4x - 3y = -5
___________________________--
dapat -7y = 7
y = -1
maka 2x - 5y = 1
2x - 5(-1) = 1
2x + 5 = 1
2x=-4
x= -2