Question

0.2分之x-2减去0.5分之x+1=3

Answer 1

(x-2)/0.2-(x+1)/0.5=3

所以(x-2)/(1/5)-(x+1)/(1/2)=3

5(x-2)-2(x+1)=3

5x-10-2x-2=3

5x-2x=3+10+2

3x=15

x=5