Suppose that 4 times the cube of a number equals 36 times the number. Find the number.
a) x = 2 or x = 4 or x = -4
b) x = -2 or x = -3 or x = 6
c) x = -4 or x = 4 or x = 8
d) x = 0 or x = -3 or x = 3
with solution please