{(2m-1)/5+(3n-2)/4=2 {(3m+1)/5-(3n+2)/4=0

问题描述:

{(2m-1)/5+(3n-2)/4=2 {(3m+1)/5-(3n+2)/4=0

(2m-1)/5+(3n-2)/4=2
两边乘20
8m-4+15n-10=40
8m+15n=54 (1)
(3m+1)/5-(3n+2)/4=0
两边乘20
12m+4-15n-10=0
12m-15n=6 (2)
(1)+(2)
20m=60
所以
m=3
n=(12m-6)/15=2