30+90+66+X=180

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Solution for 30+90+66+X=180 equation: 


Simplifying
30 + 90 + 66 + X = 180

Combine like terms: 30 + 90 = 120
120 + 66 + X = 180

Combine like terms: 120 + 66 = 186
186 + X = 180

Solving
186 + X = 180

Solving for variable 'X'.

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

Add '-186' to each side of the equation.
186 + -186 + X = 180 + -186

Combine like terms: 186 + -186 = 0
0 + X = 180 + -186
X = 180 + -186

Combine like terms: 180 + -186 = -6
X = -6

Simplifying
X = -6

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