Răspuns :
1 3n+n+9n 13n 156
n + ----- * n + 3*n = 52 => -------------- = 52 => -------- = ------- => 13n=156 =>
3 3 3 3
=> n=12
n + ----- * n + 3*n = 52 => -------------- = 52 => -------- = ------- => 13n=156 =>
3 3 3 3
=> n=12