SOLUTION: If 4 grapefruits sell for 79 cents, how much will 6 grapefruits cost?

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Question 309173: If 4 grapefruits sell for 79 cents, how much will 6 grapefruits cost?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Let c = cost of 6 grapefruits
4/6 = 0.79/c
Can you solve for c now?
HINT: Cross-multiply to start with.