Question

解方程：0.2分之x=3 --0.5分之0.4x—1=2.5

Answer 1

x/0.2=3

x=0.2*3

x=0.6

(0.4x-1)/0.5=2.5

(0.4x-1)/(1/2)=2.5

2*(0.4x-1)=2.5

0.8x-2=2.5

0.8x=4.5

8x=45

x=45/8

x=5.625