6x+3-12=15

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Solution for 6x+3-12=15 equation: 


Simplifying
6x + 3 + -12 = 15

Reorder the terms:
3 + -12 + 6x = 15

Combine like terms: 3 + -12 = -9
-9 + 6x = 15

Solving
-9 + 6x = 15

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 6x = 15 + 9

Combine like terms: -9 + 9 = 0
0 + 6x = 15 + 9
6x = 15 + 9

Combine like terms: 15 + 9 = 24
6x = 24

Divide each side by '6'.
x = 4

Simplifying
x = 4

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