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general ability

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Richard's age is equal to 3 times what it will be in 3 years time, minus 3 times what it was 4 years ago. How old is he?

a) 20
b) 21
c) 22
d) 23

  • general ability -

    let Richards present age be x

    x = 3(x+3) - 3(x-4)

    Solve

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