SOLUTION: twise a number added to 3 times itself is equal to 90.find the number.

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Question 539110: twise a number added to 3 times itself is equal to 90.find the number.
Answer by Mathpassionate(25) About Me  (Show Source):
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twice a number added to 3 times itself is equal to 90.find the number.
Let N = number

twice a number = 2N
3 times itself = 3N

So,

twice a number added to 3 times itself is equal to 90
2N+3N = 90
5N = 90
N =90/5
N = 18


The answer is 18.


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