(1/25)*x+(1/40)*2x=36 可得x=400.(1/25)*x+(1/40)*2x=36 可得x=400.

问题描述:

(1/25)*x+(1/40)*2x=36 可得x=400.(1/25)*x+(1/40)*2x=36 可得x=400.
小弟感激不尽!

(1/25)*x+(1/40)*2x=36 (1/25)*x+(1/20)*x=36 (9/100)*x=36 x=36*100/9 x=400