12+8-9=2x-12-1

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Solution for 12+8-9=2x-12-1 equation: 


Simplifying
12 + 8 + -9 = 2x + -12 + -1

Combine like terms: 12 + 8 = 20
20 + -9 = 2x + -12 + -1

Combine like terms: 20 + -9 = 11
11 = 2x + -12 + -1

Reorder the terms:
11 = -12 + -1 + 2x

Combine like terms: -12 + -1 = -13
11 = -13 + 2x

Solving
11 = -13 + 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.
11 + -2x = -13 + 2x + -2x

Combine like terms: 2x + -2x = 0
11 + -2x = -13 + 0
11 + -2x = -13

Add '-11' to each side of the equation.
11 + -11 + -2x = -13 + -11

Combine like terms: 11 + -11 = 0
0 + -2x = -13 + -11
-2x = -13 + -11

Combine like terms: -13 + -11 = -24
-2x = -24

Divide each side by '-2'.
x = 12

Simplifying
x = 12

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