{三分之2(x-y)-四分之x+y=-1,6(x+y)-4(2x-y)=16

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{三分之2(x-y)-四分之x+y=-1,6(x+y)-4(2x-y)=16

{三分之2(x-y)-四分之x+y=-1,6(x+y)-4(2x-y)=16
{三分之2(x-y)-四分之x+y=-1,6(x+y)-4(2x-y)=16

{三分之2(x-y)-四分之x+y=-1,6(x+y)-4(2x-y)=16
(2/3)(x-y)-(1/4)(x+y)=-1 8(x-y)-3(x+y)=-12 5x-11y=-12 (1)
6(x+y)-4(2x-y)=16 -2x+10y=16 -x+5y=8 (2)
(2)*5+(1) 14y=28 y=2
代入(2) x=2
方程组的解为x=2 y=2