SOLUTION: Could you please help me with the set up and answer for the following problem: A drink contains 3 ounces of orange juice and 5 ounces of 7up. How much 7up is needed for 15ounces

Question 92318: Could you please help me with the set up and answer for the following problem:
A drink contains 3 ounces of orange juice and 5 ounces of 7up. How much 7up is needed for 15ounces of orange juice?

Thank you so much!
Answer by scott8148(6628) (Show Source): You can put this solution on YOUR website!
logic tells you that if you have 5 times as much orange juice, you will need 5 times as much 7up

it is a ratio problem ... 3:5::15:x ... 3/5=15/x ... "cross" multiplying gives 3x=75 ... so x=25
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