How old am I if 400 reduced by 3 times my age is 124?

Discussion in 'Calculator Requests' started by math_celebrity, Apr 27, 2020.

  1. math_celebrity

    math_celebrity Administrator Staff Member

    How old am I if 400 reduced by 3 times my age is 124?

    Let my age be a. We're given an algebraic expression:
    • 3 times my age means we multiply a by 3: 3a
    • 400 reduced by 3 times my age means we subtract 3a from 400:
    • 400 - 3a
    • The word is mean an equation, so we set 400 - 3a equal to 124
    400 - 3a = 124

    To solve for a, we type this equation into our search engine and we get:
    a = 92
     

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