x+x+4=9

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Solution for x+x+4=9 equation: 


Simplifying
x + x + 4 = 9

Reorder the terms:
4 + x + x = 9

Combine like terms: x + x = 2x
4 + 2x = 9

Solving
4 + 2x = 9

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 2x = 9 + -4

Combine like terms: 4 + -4 = 0
0 + 2x = 9 + -4
2x = 9 + -4

Combine like terms: 9 + -4 = 5
2x = 5

Divide each side by '2'.
x = 2.5

Simplifying
x = 2.5

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