4 more than 15 is 4 + 15 = 19.
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The number that is 4 more than 15 can be found by adding 4 to 15. Therefore, 15 + 4 = 19. So, the number that is 4 more than 15 is 19.
X = number. 4X + 9 = 2X - 15 ===========
4n+3 = 15 15 - 3 = 12 4n = 12 12 / 4 = 3 (3 X 4) + 3 = 15
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