(-x+21)2=11+17

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Solution for (-x+21)2=11+17 equation:


Simplifying
(-1x + 21) * 2 = 11 + 17

Reorder the terms:
(21 + -1x) * 2 = 11 + 17

Reorder the terms for easier multiplication:
2(21 + -1x) = 11 + 17
(21 * 2 + -1x * 2) = 11 + 17
(42 + -2x) = 11 + 17

Combine like terms: 11 + 17 = 28
42 + -2x = 28

Solving
42 + -2x = 28

Solving for variable 'x'.

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

Add '-42' to each side of the equation.
42 + -42 + -2x = 28 + -42

Combine like terms: 42 + -42 = 0
0 + -2x = 28 + -42
-2x = 28 + -42

Combine like terms: 28 + -42 = -14
-2x = -14

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

Simplifying
x = 7

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