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boron is ten years older than his sister in three years he will be twice as old as she is now. How old are they now?

User Dan Doyon
by
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2 Answers

6 votes

Answer:

Boron is 23

sister 13

Explanation:

User Kamil Svoboda
by
8.4k points
3 votes
Equations:
B = s + 10
B+3 = 2(s+3)
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Substitute for "B" and solve for "s"::
s+10 + 3 = 2s+6

s + 13 = 2s+6
s = 7 (Sister's age)
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B = s + 10 = 17 (Boron's age now)
User Anton Manevskiy
by
8.2k points

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