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x+y=24
2x+4y=62
hacemos reduccion:
-2(x+y=24) ............. -2x-2y= -48
2x+4y=62.................2x+4y=62
2y=14................y=14/2..............y=7
si y=7
x+y=24
x+7=24
x=24-7
x=17
hay 17 gallinas y 7 conejos