3(X-4)+3x=-18

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Solution for 3(X-4)+3x=-18 equation: 


Simplifying
3(X + -4) + 3x = -18

Reorder the terms:
3(-4 + X) + 3x = -18
(-4 * 3 + X * 3) + 3x = -18
(-12 + 3X) + 3x = -18

Solving
-12 + 3X + 3x = -18

Solving for variable 'X'.

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

Add '12' to each side of the equation.
-12 + 3X + 12 + 3x = -18 + 12

Reorder the terms:
-12 + 12 + 3X + 3x = -18 + 12

Combine like terms: -12 + 12 = 0
0 + 3X + 3x = -18 + 12
3X + 3x = -18 + 12

Combine like terms: -18 + 12 = -6
3X + 3x = -6

Add '-3x' to each side of the equation.
3X + 3x + -3x = -6 + -3x

Combine like terms: 3x + -3x = 0
3X + 0 = -6 + -3x
3X = -6 + -3x

Divide each side by '3'.
X = -2 + -1x

Simplifying
X = -2 + -1x

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