(x+9)+(x-11)=180

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Solution for (x+9)+(x-11)=180 equation:


Simplifying
(x + 9) + (x + -11) = 180

Reorder the terms:
(9 + x) + (x + -11) = 180

Remove parenthesis around (9 + x)
9 + x + (x + -11) = 180

Reorder the terms:
9 + x + (-11 + x) = 180

Remove parenthesis around (-11 + x)
9 + x + -11 + x = 180

Reorder the terms:
9 + -11 + x + x = 180

Combine like terms: 9 + -11 = -2
-2 + x + x = 180

Combine like terms: x + x = 2x
-2 + 2x = 180

Solving
-2 + 2x = 180

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + 2x = 180 + 2

Combine like terms: -2 + 2 = 0
0 + 2x = 180 + 2
2x = 180 + 2

Combine like terms: 180 + 2 = 182
2x = 182

Divide each side by '2'.
x = 91

Simplifying
x = 91

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