3x+7-4=12

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


Simplifying
3x + 7 + -4 = 12

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

Combine like terms: 7 + -4 = 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 = 9
3x = 9

Divide each side by '3'.
x = 3

Simplifying
x = 3

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