Kofi is twice as old as nimo, 3 years ago, kofi was 3 times as old as nimo.

Answer 1

k = 2 n
k-3 = 3(n-3)
so k = 3 + 3 n - 9 = 3 n - 6
so
2 n = 3 n - 6
n = 6
your turn