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Pre-AlgebraSuperchallengeAlgebra & Manipulation

Algebra & Manipulation · Superchallenge problem

Three numbers aa, bb, cc satisfy (a+b):(b+c):(c+a)=5:7:8(a+b):(b+c):(c+a)=5:7:8, and a+b+c=60a+b+c=60. What is cc?