SOLUTION: Cara has 12 more dolls than Mara, Mara has twice the number of dolls as Sara, and Sara has 15 dolls. How many dolls do the three girls have together?

SOLUTION: Cara has 12 more dolls than Mara, Mara has twice the number of dolls as Sara, and Sara has 15 dolls. How many dolls do the three girls have together?

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Question 234039: Cara has 12 more dolls than Mara, Mara has twice the number of dolls as Sara, and
Sara has 15 dolls. How many dolls do the three girls have together?
Answer by dawny74(8) (Show Source): You can put this solution on YOUR website!
Let a = Sara's dolls
Let x = cara's dolls
let y = Mara's dolls
let z = total dolls
equation is s(2) + x = z
15(2) = y
y=30
30 + 12 = x
x=42
15(2)+42 = z
z=72
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