Respostas

2014-08-20T23:37:42-03:00
X+2y=5
4x-y=2 (²)
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x+2y=5
8x-2y=4
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9x=9
x=9/9
x=1
Descobrindo valor de y
1+2y=5
2y=5-1
2y=4
y=4/2
y=2
2 5 2