Luis is 30 and his daughter is 4 how long until luis is 3 times older than vannesa

Question

This is for my math homework

Answer 1

Let L=Luis age  and V=Vanesas age They have an age difference of L-V=26 years(1)

Some years later it will be L=3V(2) so the (1) will be after substituting where L by 3V; 3V-V=26

2V=26  V=26/2=13 That means that it will happen when Vanessa will be 13 years old. Since she is now

4 years old, that will happen 13-4 = 9 years later (when she will be 13) Luis will be 30+9=39 years of age

check;  39=3 x 13