3X-12=-57

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Solution for 3X-12=-57 equation: 


Simplifying
3X + -12 = -57

Reorder the terms:
-12 + 3X = -57

Solving
-12 + 3X = -57

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 + 12 + 3X = -57 + 12

Combine like terms: -12 + 12 = 0
0 + 3X = -57 + 12
3X = -57 + 12

Combine like terms: -57 + 12 = -45
3X = -45

Divide each side by '3'.
X = -15

Simplifying
X = -15

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