78+90+x=180

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Solution for 78+90+x=180 equation: 


Simplifying
78 + 90 + x = 180

Combine like terms: 78 + 90 = 168
168 + x = 180

Solving
168 + x = 180

Solving for variable 'x'.

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

Add '-168' to each side of the equation.
168 + -168 + x = 180 + -168

Combine like terms: 168 + -168 = 0
0 + x = 180 + -168
x = 180 + -168

Combine like terms: 180 + -168 = 12
x = 12

Simplifying
x = 12

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