(3x)x=48

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Solution for (3x)x=48 equation: 


Simplifying
(3x) * x = 48

Remove parenthesis around (3x)
3x * x = 48

Multiply x * x
3x2 = 48

Solving
3x2 = 48

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Divide each side by '3'.
x2 = 16

Simplifying
x2 = 16

Take the square root of each side:
x = {-4, 4}

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