X+x+9=18+1x

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Solution for X+x+9=18+1x equation:


Simplifying
X + x + 9 = 18 + 1x

Reorder the terms:
9 + X + x = 18 + 1x

Solving
9 + X + x = 18 + 1x

Solving for variable 'X'.

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

Add '-9' to each side of the equation.
9 + X + -9 + x = 18 + -9 + 1x

Reorder the terms:
9 + -9 + X + x = 18 + -9 + 1x

Combine like terms: 9 + -9 = 0
0 + X + x = 18 + -9 + 1x
X + x = 18 + -9 + 1x

Combine like terms: 18 + -9 = 9
X + x = 9 + 1x

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

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

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

Simplifying
X = 9

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