Miriam is four years older than Ricardo. Ten years ago Miriam was 3 times as old as Ricardo was then. How old are they now?

Answer 1

Ricardo --- x years
Miriana ---- x+4

Ten years ago:
Ricardo --- x-10
Miriam --- x+4 - 10 = x-6

x-6 = 3(x-10)
easy to solve ...

let me know what you get

Answer 2

Ricardo is 3 years older than Courtney. In 5 years the sum of their ages will be 81. How old is Ricardo now?