3+2x+x=-18

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


Simplifying
3 + 2x + x = -18

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

Solving
3 + 3x = -18

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 3x = -18 + -3

Combine like terms: 3 + -3 = 0
0 + 3x = -18 + -3
3x = -18 + -3

Combine like terms: -18 + -3 = -21
3x = -21

Divide each side by '3'.
x = -7

Simplifying
x = -7

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