SOLUTION: when 15 is added to twice a number, the result is the same as when 3 is added to 5 times the number. What is the number?

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Question 905705: when 15 is added to twice a number, the result is the same as when 3 is added to 5 times the number. What is the number?
Answer by JulietG(1812) About Me  (Show Source):
You can put this solution on YOUR website!
15 + 2X = 3 + 5X
Subtract 2X from each side
15 = 3 + 3X
Subtract 3 from each side
12 = 3X
Divide each side by 3
4 = x
Prove it:
When 15 is added to twice a number (15+8=23), the result is the same as when 3 is added to 5 times the number (3+20=23).