解下列二元一次方程组:①x-y=3,2y+3(x-y)=11 ②x+y/2+x-y/3=6,4(解下列二元一次方程组:①x-y=3,2y+3(x-y)=11②x+y/2+x-y/3=6,4(x+y)-5(x-y)=2

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解下列二元一次方程组:①x-y=3,2y+3(x-y)=11 ②x+y/2+x-y/3=6,4(
解下列二元一次方程组:
①x-y=3,2y+3(x-y)=11
②x+y/2+x-y/3=6,4(x+y)-5(x-y)=2