20+x+x+.2x=180

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Solution for 20+x+x+.2x=180 equation: 


Simplifying
20 + x + x + 0.2x = 180

Combine like terms: x + x = 2x
20 + 2x + 0.2x = 180

Combine like terms: 2x + 0.2x = 2.2x
20 + 2.2x = 180

Solving
20 + 2.2x = 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 + 2.2x = 180 + -20

Combine like terms: 20 + -20 = 0
0 + 2.2x = 180 + -20
2.2x = 180 + -20

Combine like terms: 180 + -20 = 160
2.2x = 160

Divide each side by '2.2'.
x = 72.72727273

Simplifying
x = 72.72727273

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