12+90+x=180

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Solution for 12+90+x=180 equation: 


Simplifying
12 + 90 + x = 180

Combine like terms: 12 + 90 = 102
102 + x = 180

Solving
102 + x = 180

Solving for variable 'x'.

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

Add '-102' to each side of the equation.
102 + -102 + x = 180 + -102

Combine like terms: 102 + -102 = 0
0 + x = 180 + -102
x = 180 + -102

Combine like terms: 180 + -102 = 78
x = 78

Simplifying
x = 78

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