x+x+x-x=20

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Solution for x+x+x-x=20 equation: 


Simplifying
x + x + x + -1x = 20

Combine like terms: x + x = 2x
2x + x + -1x = 20

Combine like terms: 2x + x = 3x
3x + -1x = 20

Combine like terms: 3x + -1x = 2x
2x = 20

Solving
2x = 20

Solving for variable 'x'.

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

Divide each side by '2'.
x = 10

Simplifying
x = 10

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