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schepotkina [342]
3 years ago
9

Three years ago, Marry was three times as old as his brother. Five years from now he will be twice as old as his brother. How is

Marry now?
Mathematics
1 answer:
chubhunter [2.5K]3 years ago
5 0
3 years ago:
m - 3 = 3(b - 3)
m - 3 = 3b - 9
m + 6 = 3b
m/3 + 2 = b

5 years from now:
m + 5 = 2(b + 5)
m + 5 = 2b + 10
m - 5 = 2b
m/2 - 5/2 = b

combine:
m/3 + 2 = m/2 - 5/2

1. multiply by 6
2m + 12 = 3m - 15

2. add 15 - 2m to both sides
27 = m

Marry is 27 years old.
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