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Math Help - Simultaneous Equations Help

  1. #1
    Junior Member 22upon7's Avatar
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    Simultaneous Equations Help

    Could someone please show me how to do this sum using simultaneous Equations, step by step so I could use it as an example to work out similar sums?

    In four years time a mother will be three times as old as her son. Four years ago she was five times as old as her son. Find their present ages.
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    Senior Member vincisonfire's Avatar
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  3. #3
    Junior Member 22upon7's Avatar
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    Quote Originally Posted by vincisonfire View Post
    Thanks, I know how to work the simultaneous equations out but I need to know how to construct the simultaneous equation for these kind of sums.
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  4. #4
    Senior Member vincisonfire's Avatar
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    x = age of mother now
    y = age of son now
    x+4 = age of mother in four years
    y+4 = age of son in four years
    etc.
    First statement :  x+4=3(y+4)
    Second statement :  y-4=5(y-4)
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