用代入法解下列二元一次方程组 (1){x+5y=6,3x-6y=4 (2){5x-2y=-2,x+3y=3 (3){2a=-3b,3a-2b=5
(4){2x-3y=3,3x+2y=11(5){6(x-y)-7(x+y)=21,2(x-y)-5(x+y)=-1(6){x+3y=4,1/4x+1/2y=0(7){3y...
(4){2x-3y=3,3x+2y=11
(5){6(x-y)-7(x+y)=21,2(x-y)-5(x+y)=-1
(6){x+3y=4,1/4x+1/2y=0
(7){3y-2x=1,x+2/3=y+1/4 展开
(5){6(x-y)-7(x+y)=21,2(x-y)-5(x+y)=-1
(6){x+3y=4,1/4x+1/2y=0
(7){3y-2x=1,x+2/3=y+1/4 展开
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