3x-4=5+12

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Solution for 3x-4=5+12 equation: 


Simplifying
3x + -4 = 5 + 12

Reorder the terms:
-4 + 3x = 5 + 12

Combine like terms: 5 + 12 = 17
-4 + 3x = 17

Solving
-4 + 3x = 17

Solving for variable 'x'.

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

Add '4' to each side of the equation.
-4 + 4 + 3x = 17 + 4

Combine like terms: -4 + 4 = 0
0 + 3x = 17 + 4
3x = 17 + 4

Combine like terms: 17 + 4 = 21
3x = 21

Divide each side by '3'.
x = 7

Simplifying
x = 7

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