X+(18-x)=18

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Solution for X+(18-x)=18 equation:


Simplifying
X + (18 + -1x) = 18

Remove parenthesis around (18 + -1x)
X + 18 + -1x = 18

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

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

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

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

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

Solving
X + -1x = 0

Solving for variable 'X'.

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

Add 'x' to each side of the equation.
X + -1x + x = 0 + x

Combine like terms: -1x + x = 0
X + 0 = 0 + x
X = 0 + x
Remove the zero:
X = x

Simplifying
X = x

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