[20y+100=x,25y-50=x]

来源：学生作业帮助网编辑：作业帮时间：2024/05/07 21:43:39

[20y+100=x,25y-50=x]
[20y+100=x,25y-50=x]

[20y+100=x,25y-50=x]
用25y-50=x减去20y+100=x
得5y-150=0
y=30
把y=30代入20y+100=x
得x=700
故x=700 y=30

Y=30 X=700

20Y+100=25y-50
5Y=150
Y=30
X=700

x=700,y=30