x+3+9=13

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Solution for x+3+9=13 equation: 


Simplifying
x + 3 + 9 = 13

Reorder the terms:
3 + 9 + x = 13

Combine like terms: 3 + 9 = 12
12 + x = 13

Solving
12 + x = 13

Solving for variable 'x'.

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

Add '-12' to each side of the equation.
12 + -12 + x = 13 + -12

Combine like terms: 12 + -12 = 0
0 + x = 13 + -12
x = 13 + -12

Combine like terms: 13 + -12 = 1
x = 1

Simplifying
x = 1

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