X-(-9)=18

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Solution for X-(-9)=18 equation: 


Simplifying
X + -1(-9) = 18

Multiply -1 * -9
X + 9 = 18

Reorder the terms:
9 + X = 18

Solving
9 + X = 18

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 + -9 + X = 18 + -9

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

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

Simplifying
X = 9

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