Ricardo ----- x
Miriam ------ x+4
10 years ago:
Ricardo -- x-10
Miriam --- x+4-10 = x-6
at that time she was 3 times as old as Ricardo
x-6 = 3(x-10
x-6 = 3x - 30
-2x = -24
x = 12
Ricardo IS now 12
and Miriam is now 16
You check the answers to make sure the conditions fit.
Miriam is four years older than Ricardo. 10 years ago she was 3 times as old as Ricardo was then.
A) How old are they now
B) determine whether your answer is correct by checking that it satisfies the conditions of the problems
1 answer
1 answer