12=3(x-1)-(x-9)

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Solution for 12=3(x-1)-(x-9) equation:


12=3(x-1)-(x-9)

We simplify the equation to the form, which is simple to understand 
12=3(x-1)-(x-9)

Reorder the terms in parentheses
12=+(+3x-3)-(x-9)

Remove unnecessary parentheses
+12=+3x-3-(+x-9+)

Remove unnecessary parentheses
12=+3x-3-1x+9

We move all terms containing x to the left and all other terms to the right. 
-3x+1x=-3+9-12

We simplify left and right side of the equation. 
-2x=-6

We divide both sides of the equation by -2 to get x. 
x=3

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