SOLUTION: Alec is ten years older than his sister, Alisa. Alec is also twice as old as his brother, Ivan. How old is each sibling if the sum of their ages is 50? Use 5 Step Problem Solving

Question 344378: Alec is ten years older than his sister, Alisa. Alec is also twice as old as his brother, Ivan. How old is each sibling if the sum of their ages is 50? Use 5 Step Problem Solving
Answer by Fombitz(32388) (Show Source): You can put this solution on YOUR website!
-Alec
-Alisa
-Ivan
.
.
1.
2.
3.
From eq. 1,

From eq. 2,

Substitute both results into eq. 3,

Multiply both sides by ,

Then

And finally,

.
.
.
Alec is 24, Alisa is 14, and Ivan is 12.

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