Respostas

2013-11-09T19:20:54-02:00
IRÁ FORMAR UM SISTEMA 
3x+4y=80
2x-y=35 .(+4)

3x+4y=80
8x-4y=180
_________
5x=160
x=160/5
x=32

3x+4y=80
3.32+4y=80
96+4y=80
4y=80-96
4y=16
y=16/4
y=4

Y/X = 32/4 = 8
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