Question

2(x-y)/3-(x+y)/4=-1/12,3(x+y)-2(2x-y)=3求这个二元一次方程的解

Answer 1

2(x-y)/3-(x+y)/4=-1/12,

8(x-y)-3(x+y)=-1;

5x-11y=-1(1)

3(x+y)-2(2x-y)=3

3x+3y-4x+2y=3;

5y-x=3;

25y-5x=15;

14y=14;

y=1;

x=2;

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