3X+12-4=20

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Solution for 3X+12-4=20 equation: 


Simplifying
3X + 12 + -4 = 20

Reorder the terms:
12 + -4 + 3X = 20

Combine like terms: 12 + -4 = 8
8 + 3X = 20

Solving
8 + 3X = 20

Solving for variable 'X'.

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

Add '-8' to each side of the equation.
8 + -8 + 3X = 20 + -8

Combine like terms: 8 + -8 = 0
0 + 3X = 20 + -8
3X = 20 + -8

Combine like terms: 20 + -8 = 12
3X = 12

Divide each side by '3'.
X = 4

Simplifying
X = 4

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