x+6-3x=-18

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


Simplifying
x + 6 + -3x = -18

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

Combine like terms: x + -3x = -2x
6 + -2x = -18

Solving
6 + -2x = -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 + -2x = -18 + -6

Combine like terms: 6 + -6 = 0
0 + -2x = -18 + -6
-2x = -18 + -6

Combine like terms: -18 + -6 = -24
-2x = -24

Divide each side by '-2'.
x = 12

Simplifying
x = 12

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