x+x+(x-20)=180

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Solution for x+x+(x-20)=180 equation: 


Simplifying
x + x + (x + -20) = 180

Reorder the terms:
x + x + (-20 + x) = 180

Remove parenthesis around (-20 + x)
x + x + -20 + x = 180

Reorder the terms:
-20 + x + x + x = 180

Combine like terms: x + x = 2x
-20 + 2x + x = 180

Combine like terms: 2x + x = 3x
-20 + 3x = 180

Solving
-20 + 3x = 180

Solving for variable 'x'.

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

Add '20' to each side of the equation.
-20 + 20 + 3x = 180 + 20

Combine like terms: -20 + 20 = 0
0 + 3x = 180 + 20
3x = 180 + 20

Combine like terms: 180 + 20 = 200
3x = 200

Divide each side by '3'.
x = 66.66666667

Simplifying
x = 66.66666667

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