6+3x+x=-18

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Solution for 6+3x+x=-18 equation: 


Simplifying
6 + 3x + x = -18

Combine like terms: 3x + x = 4x
6 + 4x = -18

Solving
6 + 4x = -18

Solving for variable 'x'.

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

Add '-6' to each side of the equation.
6 + -6 + 4x = -18 + -6

Combine like terms: 6 + -6 = 0
0 + 4x = -18 + -6
4x = -18 + -6

Combine like terms: -18 + -6 = -24
4x = -24

Divide each side by '4'.
x = -6

Simplifying
x = -6

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