1/4x+2/5x+2/5x+10+20=x
问题描述:
1/4x+2/5x+2/5x+10+20=x
答
1/4x+2/5x+2/5x+10+20=x
x/4+4x/5+30=x
x-x/4-4x/5=30
-x/20=30
x=-600