heeeeey help lol

Question

greg was 50 yrs old when his son turned 12.

in how many yrs time would he be thrice as old as his son?

thanks :)

Answer 1

Let n be the number of years

50 + n = 3(12 +n)

50+n = 36+3n

2n = 50-36 = 14

n = 7

Check:

50+7 = 36+21

57 = 57