x+2x+(x-2)=20

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Solution for x+2x+(x-2)=20 equation:


Simplifying
x + 2x + (x + -2) = 20

Reorder the terms:
x + 2x + (-2 + x) = 20

Remove parenthesis around (-2 + x)
x + 2x + -2 + x = 20

Reorder the terms:
-2 + x + 2x + x = 20

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

Combine like terms: 3x + x = 4x
-2 + 4x = 20

Solving
-2 + 4x = 20

Solving for variable 'x'.

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

Add '2' to each side of the equation.
-2 + 2 + 4x = 20 + 2

Combine like terms: -2 + 2 = 0
0 + 4x = 20 + 2
4x = 20 + 2

Combine like terms: 20 + 2 = 22
4x = 22

Divide each side by '4'.
x = 5.5

Simplifying
x = 5.5

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