x-2/5-36-2/3(x-2/5x-36)=30

问题描述:

x-2/5-36-2/3(x-2/5x-36)=30
请帮小弟吧!

x-2/5-36-2/3(x-2/5x-36)=30
x-2/5-2/3(x-2/5x-36)=66
x-2/5-2/3(3x/5-36)=66
x-2/5-2x/5+24=66
x-2/5-2x/5=42
3x/5=42+2/5
3x/5=212/5
3x=212
x=212/3