SOLUTION: alice is twice as old as brian. cristal is three years younger then brian .the sum of their ages is 45. how old is cristal?

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Question 213106: alice is twice as old as brian. cristal is three years younger then brian .the sum of their ages is 45. how old is cristal?
Answer by edjones(8007) About Me  (Show Source):
You can put this solution on YOUR website!
Let a=alice's age, b=brian's and c=crystal's
a=2b
c=b-3
.
b+2b+b-3=45
4b-3=45
4b=48
b=12
a=24
c=9
.
Ed