-40-2x=9-9

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Solution for -40-2x=9-9 equation: 


Simplifying
-40 + -2x = 9 + -9

Combine like terms: 9 + -9 = 0
-40 + -2x = 0

Solving
-40 + -2x = 0

Solving for variable 'x'.

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

Add '40' to each side of the equation.
-40 + 40 + -2x = 0 + 40

Combine like terms: -40 + 40 = 0
0 + -2x = 0 + 40
-2x = 0 + 40

Combine like terms: 0 + 40 = 40
-2x = 40

Divide each side by '-2'.
x = -20

Simplifying
x = -20

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