(2x)2=(x)2+(9)2

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Solution for (2x)2=(x)2+(9)2 equation: 


Simplifying
(2x) * 2 = (x) * 2 + (9) * 2

Remove parenthesis around (2x)
2x * 2 = (x) * 2 + (9) * 2

Reorder the terms for easier multiplication:
2 * 2x = (x) * 2 + (9) * 2

Multiply 2 * 2
4x = (x) * 2 + (9) * 2

Reorder the terms for easier multiplication:
4x = 2x + (9) * 2

Multiply 9 * 2
4x = 2x + 18

Reorder the terms:
4x = 18 + 2x

Solving
4x = 18 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
4x + -2x = 18 + 2x + -2x

Combine like terms: 4x + -2x = 2x
2x = 18 + 2x + -2x

Combine like terms: 2x + -2x = 0
2x = 18 + 0
2x = 18

Divide each side by '2'.
x = 9

Simplifying
x = 9

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