用代数法解下列方程组!4(x-y-1)=3(1-y)-2 x/2+y/3=2如题
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用代数法解下列方程组!4(x-y-1)=3(1-y)-2 x/2+y/3=2如题
用代数法解下列方程组!4(x-y-1)=3(1-y)-2 x/2+y/3=2
如题
用代数法解下列方程组!4(x-y-1)=3(1-y)-2 x/2+y/3=2如题
x/2+y/3=2 ,则x=4-2y/3,代入 4(x-y-1)=3(1-y)-2,得
4(4-2y/3-y-1)=3(1-y)-2
则12-20y/3=1-3y
则11=11y/3
解得y=3
代入x=4-2y/3,解得x=2