-2x=9-(-11)

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Solution for -2x=9-(-11) equation: 


Simplifying
-2x = 9 + -1(-11)

Multiply -1 * -11
-2x = 9 + 11

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

Solving
-2x = 20

Solving for variable 'x'.

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

Divide each side by '-2'.
x = -10

Simplifying
x = -10

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