Question

（x-45)/(x-20)=0.65这个方程怎么解

Answer 1

（x-45)/(x-20)=0.65

(x-45)/(x-20)=65/100

(x-45)/(x-20)=13/20

13(x-20)=20(x-45)

13x-260=20x-900

20x-13x=900-260

7x=640

x=640/7

经检验,满足题意