me ajudem a resolver estes exercicios
Anexos:
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1 questoes: {3x-2y=-1 2x+5y=12 {2x+5y=12 2.2+5y=12 5x=11 5+5y=12 x=11/5>x=2.2 5y=12-5 5y=7 y=7/5>y=1.4
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