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  • Brainly User
2015-12-04T03:54:22+08:00

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Present ages:
Lilet: x
Margie: 3x

In 15 years:
Lilet: x + 15
Margie: 3x + 15

Equation:
(x+15) + (3x+15) = 38
4x + 30 = 38
4x = 38 - 30
4x = 8
4x/4 = 8/4
x = 2

Present ages:
Lilet: x = 2 years old
Margie: 3x = 3(2) = 6 years old

ANSWER:  At present, Margie is 6 years old and Lilet is 2 years old.

Check:
In 15 years, the sum of their ages is 38.
Lilet : 2 + 15 = 17 years old
Margie: 6 + 15 = 21 years old

17 + 21 = 38
38 = 38



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