x+2x+x+20=18

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Solution for x+2x+x+20=18 equation:


Simplifying
x + 2x + x + 20 = 18

Reorder the terms:
20 + x + 2x + x = 18

Combine like terms: x + 2x = 3x
20 + 3x + x = 18

Combine like terms: 3x + x = 4x
20 + 4x = 18

Solving
20 + 4x = 18

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 + 4x = 18 + -20

Combine like terms: 20 + -20 = 0
0 + 4x = 18 + -20
4x = 18 + -20

Combine like terms: 18 + -20 = -2
4x = -2

Divide each side by '4'.
x = -0.5

Simplifying
x = -0.5

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