25% of 16 (15-?)³=256
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Answer:
X = 11
Step-by-step explanation:
(a-b)^3 = a^3+b^3-3ab(a-b)
1/4 * 16 (15-x)^3 = 256
(15-x)^3 = 64
15-x = 4
X = 11
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