2x(4x)=200

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Solution for 2x(4x)=200 equation: 


Simplifying
2x(4x) = 200

Remove parenthesis around (4x)
2x * 4x = 200

Reorder the terms for easier multiplication:
2 * 4x * x = 200

Multiply 2 * 4
8x * x = 200

Multiply x * x
8x2 = 200

Solving
8x2 = 200

Solving for variable 'x'.

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

Divide each side by '8'.
x2 = 25

Simplifying
x2 = 25

Take the square root of each side:
x = {-5, 5}

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