Age Problem. An application of Solving linear equations involving two variables. Recall:. Two ways in solving for a system of linear equations. Two ways. By substitution By elimination. Age Problem.
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An application of Solving linear equations involving two variables
Two ways in solving for a system of linear equations
Danny is 5 years older than Nila. Seven years ago, Danny was twice as old as Nila. What are their ages now?
(In solving problem # 1, we use the method of substitution.)
The sum of Aiza’s present age and her grandfather’s present age is 68. In three years, Aiza's grandfather will be six times as old as Aiza was last year. How old is each one now?
(We use the elimination method in problem # 2.)