2. The sum of Jason and Mandy’s ages is 35. Ten years ago, Jason was double Mandy’s age. How old are they now?
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Answer:
x - Mandy's age 10 years ago
x + 10 Mandy's present age
2x Jason's age 10 years ago
2x + 10 Jason's present age
x + 10 + 2x + 10 = 35
3x + 20 = 35
3x = 35 - 20
3x = 15
x = 5
x + 10 Mandy's present age
= 5 + 10
= 15 years old
2x + 10 Jason's present age
=2(5) + 10
= 10 + 10
= 20 years old