9+x=12-7

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Solution for 9+x=12-7 equation: 


Simplifying
9 + x = 12 + -7

Combine like terms: 12 + -7 = 5
9 + x = 5

Solving
9 + x = 5

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 = 5 + -9

Combine like terms: 9 + -9 = 0
0 + x = 5 + -9
x = 5 + -9

Combine like terms: 5 + -9 = -4
x = -4

Simplifying
x = -4

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