Question

求解这个方程

22.5/(x-12)=31.5/x
要求详细过程！
/ 等于 ÷

Answer 1

22.5/(x-12)=31.5/x
即22.5x=31.5(x--12)
22.5x=31.5x—31.5×12
22.5x=31.5x—378
31.3x-22.5x=378
7x=378
X=54

Answer 2

答：22.5x=31.5(x-12)
22.5x=31.5x-378
22.5x-31.5x= - 378
(22.5-31.5)x= - 378
- 9 x= - 378
x=42

Answer 3

22.5/(x-12)=31.5/x
31.5（x-12)=22.5x
31.5x-378=22.5x
9x=378
x=42

Answer 4

22.5/(x-12)=31.5/x
22.5x=31.5x-31.5×12
9x=31.5×12
x=42