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word problem

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bisi and ada age added up to 29, 7 years ago bisi was twice as old as ada, find their present age.

  • word problem -

    bisi now -- x
    ada now -- 29-x

    7 yrs ago:
    bisi -- x-7
    ada -- 29-x - 7 = 22-x

    x-7 = 2(22-x)
    x-7 = 44 - 2x
    3x = 51
    x = 17

    bisi is now 17
    ada is now 12

    check:
    7 years ago: bisi was 10, ada was 5
    Was bisi twice as old as ada ?? YES

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