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Posted by on Saturday, November 23, 2013 at 5:58pm.

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

  • math - , Saturday, November 23, 2013 at 6:54pm

    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.

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