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irina irina
wrote...
Posts: 919
12 years ago
In Simultaneous Linear Equations
How can you tell when to use substitution or elimination, such as in the question
1. In five years time, a father will be three times as old as his son. Four years ago, the father was four times as old as his son. Find their present ages.
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nyashanyasha
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Posts: 11
Rep: 0 0
12 years ago
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