Question

afla valoarea lui n din egalitatea 24+n+39=n+n+n+n.

Answer 1

63+n = 4n
63=4n-n
63=3n
n=63:3
n=21

Answer 2

24+ n+ 39= n+n+ n+n ; 63 + n = 4n ; 63= 4n-n ; 63= 3n ; n= 63:3 ; n= 21