3[x-3]=18

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


Simplifying
3[x + -3] = 18

Reorder the terms:
3[-3 + x] = 18
[-3 * 3 + x * 3] = 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 = 27
3x = 27

Divide each side by '3'.
x = 9

Simplifying
x = 9

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