Question

用代入消元法解此题大括号：x+1/3=2y2(x+1)-y=11

Answer 1

x=2y-1/3;

2(2y-1/3)-y=11

4y-2/3-y=11

3y-2/3=11

9y-2=33

9y=35

y=35/9;

把y=35/9代入x+1/3=2y得

x+1/3=2*35/9

x+3=70

x=67

所以x=67,y=35/9