13=x+9

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Solution for 13=x+9 equation:


Simplifying
13 = x + 9

Reorder the terms:
13 = 9 + x

Solving
13 = 9 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
13 + -1x = 9 + x + -1x

Combine like terms: x + -1x = 0
13 + -1x = 9 + 0
13 + -1x = 9

Add '-13' to each side of the equation.
13 + -13 + -1x = 9 + -13

Combine like terms: 13 + -13 = 0
0 + -1x = 9 + -13
-1x = 9 + -13

Combine like terms: 9 + -13 = -4
-1x = -4

Divide each side by '-1'.
x = 4

Simplifying
x = 4

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