mathematics

in fourteen years time a mother will be twice as old as her son .four years ago th sum of tier was 30 years.find how old was the mother when the son was born

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  1. m+14 = 2 (s+14)
    m -4 + s-4 = 30

    m + 14 = 2s + 28
    m + s = 38
    -----------------------------subtract
    0 +14 - s = 2 s - 10
    24 = 3 s
    s = 8
    so m = 30
    so m is 22 years older than s

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  2. Please can you explain how to do the sum

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  3. thanks allot

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