13=x+8+x+11

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Solution for 13=x+8+x+11 equation:


Simplifying
13 = x + 8 + x + 11

Reorder the terms:
13 = 8 + 11 + x + x

Combine like terms: 8 + 11 = 19
13 = 19 + x + x

Combine like terms: x + x = 2x
13 = 19 + 2x

Solving
13 = 19 + 2x

Solving for variable 'x'.

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

Add '-2x' to each side of the equation.
13 + -2x = 19 + 2x + -2x

Combine like terms: 2x + -2x = 0
13 + -2x = 19 + 0
13 + -2x = 19

Add '-13' to each side of the equation.
13 + -13 + -2x = 19 + -13

Combine like terms: 13 + -13 = 0
0 + -2x = 19 + -13
-2x = 19 + -13

Combine like terms: 19 + -13 = 6
-2x = 6

Divide each side by '-2'.
x = -3

Simplifying
x = -3

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