5n+5n+2=650
=>5n(1+52)=650
=>5n.26=650
=>5n=650:26
=>5n=25
=>5n=52
=>n=2
Vậy n=2
Ta có :
5n + 5n+2 = 650
5n + 5n . 52 = 650
5n . (1 + 52) = 650
5n . 26 = 650
5n = 650 : 26
5n = 25
5n = 52
Vậy n = 2
5n+5n.52=650
=>5n.(1+52)=650
=>5n .26=650
=>5n=25
=> 5n=52
=> n=2
Vậy n=2