x-x-x-x=20

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


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

Combine like terms: x + -1x = 0
0 + -1x + -1x = 20
-1x + -1x = 20

Combine like terms: -1x + -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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