1.2/5x-1/3y-y+1=0 左右乘以 15
6x-20y+15=0
2.2x+2y=7左右乘以 10
20x+20y=70
1式+2式=(6x-20y+15) +(20x+20y)=70
26x=55
x=26/55
在将x带入2式,2*26/55+2y=7
y=333/110=3又3/110
1.2/5x-1/3y-y+1=0 左右乘以 15
6x-20y+15=0
2.2x+2y=7左右乘以 10
20x+20y=70
1式+2式=(6x-20y+15) +(20x+20y)=70
26x=55
x=26/55
在将x带入2式,2*26/55+2y=7
y=333/110=3又3/110