Powers and Roots Practice Test 5

Question : 11 of 31

Marks: +1, -0

If 4 times the cube of a number is subtracted from its double, the result becomes 37,044. Find the number.

Solution:

Let the number be x.
Then,

2(4x^3) - 4x^3 = 37,044

8x^3 - 4x^3 = 37,044

4x^3 = 37,044

x^3 = 9,261

x = 21

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