Question 569347: whats 2/5 = 4/n what does n equal
Answer by IWork4Dessert(60)   (Show Source):
You can put this solution on YOUR website! In a proportion, you're basically doing the opposite of simplifying a problem, you're expanding it. When you see one, think to yourself: "Two over five is the same as four over what?"
2/5=4/n
1. Cross-multiply.
2n=20
2. Divide both sides by the number next to the variable(the letter) to get the variable alone.
n=10
There's your answer!
You know this is right because if you multiply 2/5 by 2, it equals 4/10.
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