Question 1201822
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While the problem can be solved using formal algebra, and even though that is probably the intent of the problem, you can get good problem-solving practice by solving the problem informally, using logical reasoning and simple arithmetic.<br>
sister now: 17<br>
sister 5 years ago: 17-5 = 12<br>
you 5 years ago: 12*(3/2) = 18<br>
you today: 18+5 = 23<br>
ANSWER: 23<br>