Rolando is 13 years old. In five years, his age will be 32 the age of his sister Marisa. How old will Marisa be in three years?

Answer 1

I assume you meant to say that he will be 3/2 the age of his sister
13+5 = 18 = 3/2 * 12
So, in 5 years she will be 12.
Now finish it off.