x+4x-x=20

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Solution for x+4x-x=20 equation: 


Simplifying
x + 4x + -1x = 20

Combine like terms: x + 4x = 5x
5x + -1x = 20

Combine like terms: 5x + -1x = 4x
4x = 20

Solving
4x = 20

Solving for variable 'x'.

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

Divide each side by '4'.
x = 5

Simplifying
x = 5

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