18=[3x+54]

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Solution for 18=[3x+54] equation:


Simplifying
18 = [3x + 54]

Reorder the terms:
18 = [54 + 3x]

Remove brackets around [54 + 3x]
18 = 54 + 3x

Solving
18 = 54 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
18 + -3x = 54 + 3x + -3x

Combine like terms: 3x + -3x = 0
18 + -3x = 54 + 0
18 + -3x = 54

Add '-18' to each side of the equation.
18 + -18 + -3x = 54 + -18

Combine like terms: 18 + -18 = 0
0 + -3x = 54 + -18
-3x = 54 + -18

Combine like terms: 54 + -18 = 36
-3x = 36

Divide each side by '-3'.
x = -12

Simplifying
x = -12

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