SOLUTION: Juan is 8 years older than his sister. In 3 years, he will be twice as old as she will be then. How old are they now?
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Question 268275: Juan is 8 years older than his sister. In 3 years, he will be twice as old as she will be then. How old are they now?
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
j = s + 8
j + 3 = 2(s + 3)
substituting ___ (s + 8) + 3 = 2s + 6 ___ 5 = s
j = 5 + 8 = 13
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