(-9)+x=3

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Solution for (-9)+x=3 equation: 


Simplifying
(-9) + x = 3
-9 + x = 3

Solving
-9 + x = 3

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + x = 3 + 9

Combine like terms: -9 + 9 = 0
0 + x = 3 + 9
x = 3 + 9

Combine like terms: 3 + 9 = 12
x = 12

Simplifying
x = 12

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