(3-x)2=20

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Solution for (3-x)2=20 equation:


Simplifying
(3 + -1x) * 2 = 20

Reorder the terms for easier multiplication:
2(3 + -1x) = 20
(3 * 2 + -1x * 2) = 20
(6 + -2x) = 20

Solving
6 + -2x = 20

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + -2x = 20 + -6

Combine like terms: 6 + -6 = 0
0 + -2x = 20 + -6
-2x = 20 + -6

Combine like terms: 20 + -6 = 14
-2x = 14

Divide each side by '-2'.
x = -7

Simplifying
x = -7

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