Galinhas x Coelho y. x+y=80 (-2)
2x+4y=260
-2x-2y=-160
2y=100
y=50
x+50=80
x=80-50
x=30
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x+y=80 (-2) 2x+4y=260
2x+4y=260
-2x-2y=-160 2x+4.50=260
2x+4y=260 2x=260-200
0+2y=100 x=60/2
y=100/2 x=30galinhas
y=50coelhos
Galinhas x Coelho y. x+y=80 (-2)
2x+4y=260
-2x-2y=-160
2y=100
y=50
x+50=80
x=80-50
x=30