x+x+13=280

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Solution for x+x+13=280 equation:


Simplifying
x + x + 13 = 280

Reorder the terms:
13 + x + x = 280

Combine like terms: x + x = 2x
13 + 2x = 280

Solving
13 + 2x = 280

Solving for variable 'x'.

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

Add '-13' to each side of the equation.
13 + -13 + 2x = 280 + -13

Combine like terms: 13 + -13 = 0
0 + 2x = 280 + -13
2x = 280 + -13

Combine like terms: 280 + -13 = 267
2x = 267

Divide each side by '2'.
x = 133.5

Simplifying
x = 133.5

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