3X+4-7=12

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Solution for 3X+4-7=12 equation: 


Simplifying
3X + 4 + -7 = 12

Reorder the terms:
4 + -7 + 3X = 12

Combine like terms: 4 + -7 = -3
-3 + 3X = 12

Solving
-3 + 3X = 12

Solving for variable 'X'.

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

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

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

Combine like terms: 12 + 3 = 15
3X = 15

Divide each side by '3'.
X = 5

Simplifying
X = 5

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