baldenegroalexi baldenegroalexi

22-09-2017
Mathematics

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If 3 is added to a number and the sum is tripled, the result is 15 more than the number. Find the number.

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Аноним Аноним

22-09-2017

Hello There!

Put it into an equation:

3 (x + 3) = x + 15
Expand it:
3x + 9 = x + 15
- 9 - 9
3x = x + 6
- x - x
2x = 6
Divide by 2:
x = 3

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Good Luck :)

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