方程组是4(4Y+Z)=9+9X,3(5X+Z)=6-7X,-2(3X+Z)=3Y-6

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方程组是4(4Y+Z)=9+9X,3(5X+Z)=6-7X,-2(3X+Z)=3Y-6方程组是4(4Y+Z)=9+9X,3(5X+Z)=6-7X,-2(3X+Z)=3Y-6方程组是4(4Y+Z)=9+

方程组是4(4Y+Z)=9+9X,3(5X+Z)=6-7X,-2(3X+Z)=3Y-6
方程组是4(4Y+Z)=9+9X,3(5X+Z)=6-7X,-2(3X+Z)=3Y-6

方程组是4(4Y+Z)=9+9X,3(5X+Z)=6-7X,-2(3X+Z)=3Y-6
打出来太麻烦了...这题很简单的...你自己算好了