3x-9=[-18]

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Solution for 3x-9=[-18] equation: 


Simplifying
3x + -9 = [-18]

Reorder the terms:
-9 + 3x = [-18]
-9 + 3x = -18

Solving
-9 + 3x = -18

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 3x = -18 + 9

Combine like terms: -9 + 9 = 0
0 + 3x = -18 + 9
3x = -18 + 9

Combine like terms: -18 + 9 = -9
3x = -9

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

Simplifying
x = -3

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