=(4-x)2

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Solution for =(4-x)2 equation: 


Simplifying
0 = (4 + -1x) * 2

Reorder the terms for easier multiplication:
0 = 2(4 + -1x)
0 = (4 * 2 + -1x * 2)
0 = (8 + -2x)

Solving
0 = 8 + -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.
0 + 2x = 8 + -2x + 2x
Remove the zero:
2x = 8 + -2x + 2x

Combine like terms: -2x + 2x = 0
2x = 8 + 0
2x = 8

Divide each side by '2'.
x = 4

Simplifying
x = 4

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