SOLUTION: maria is 3 years older than her brother, luis. luis is 2 years older than their younger sister, karla. the sum of their ages is 55. how old are the siblings?

Question 346221: maria is 3 years older than her brother, luis. luis is 2 years older than their younger sister, karla. the sum of their ages is 55. how old are the siblings?
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
1.
2.
3.
Substitute eq. 1 and eq. 2 into eq. 3,

Then from eq. 2,

Then from eq. 1,

.
.
.
Maria is 21, Luis is 18, and Karla is 16.
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