x-4=3+9

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Solution for x-4=3+9 equation: 


Simplifying
x + -4 = 3 + 9

Reorder the terms:
-4 + x = 3 + 9

Combine like terms: 3 + 9 = 12
-4 + x = 12

Solving
-4 + x = 12

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + x = 12 + 4

Combine like terms: -4 + 4 = 0
0 + x = 12 + 4
x = 12 + 4

Combine like terms: 12 + 4 = 16
x = 16

Simplifying
x = 16

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