Question

if 4 X equal 81 / X then find x​

Answer 1

Step-by-step explanation:

$4x = \frac{81}{x} \\ or \: \: \: \: 4x {}^{2} = 81 \\ or \: \: \: \: (2x) {}^{2} = 81 \\ or \: \: \: \: 2x = \sqrt{81} \\ or \: \: \: 2x = 9 \\ or \: \: \: \: x = \frac{ 9}{2} \\ so \: \: \: x = 4.5$

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Answer 2

Answer:

4X=81/X

XxX=81/4

X^2=20.25

X=root20. 25

X=4.5