(x+12.9)+x=723.1

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Solution for (x+12.9)+x=723.1 equation: 


Simplifying
(x + 12.9) + x = 723.1

Reorder the terms:
(12.9 + x) + x = 723.1

Remove parenthesis around (12.9 + x)
12.9 + x + x = 723.1

Combine like terms: x + x = 2x
12.9 + 2x = 723.1

Solving
12.9 + 2x = 723.1

Solving for variable 'x'.

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

Add '-12.9' to each side of the equation.
12.9 + -12.9 + 2x = 723.1 + -12.9

Combine like terms: 12.9 + -12.9 = 0.0
0.0 + 2x = 723.1 + -12.9
2x = 723.1 + -12.9

Combine like terms: 723.1 + -12.9 = 710.2
2x = 710.2

Divide each side by '2'.
x = 355.1

Simplifying
x = 355.1

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