x+3x-2=18

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Solution for x+3x-2=18 equation: 


Simplifying
x + 3x + -2 = 18

Reorder the terms:
-2 + x + 3x = 18

Combine like terms: x + 3x = 4x
-2 + 4x = 18

Solving
-2 + 4x = 18

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 = 18 + 2

Combine like terms: -2 + 2 = 0
0 + 4x = 18 + 2
4x = 18 + 2

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

Divide each side by '4'.
x = 5

Simplifying
x = 5

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