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12-3(4-7x)=9(3x+2)+x
We simplify the equation to the form, which is simple to understand
12-3(4-7x)=9(3x+2)+x
Reorder the terms in parentheses
12+(-12+21x)=9*(3x+2)+x
Remove unnecessary parentheses
+12-12+21x=+9+*(+3x+2+)+x
Reorder the terms in parentheses
12-12+21x=+(+27x+18)+x
Remove unnecessary parentheses
+12-12+21x=+27x+18+x
We move all terms containing x to the left and all other terms to the right.
+21x-27x-1x=+18-12+12
We simplify left and right side of the equation.
-7x=+18
We divide both sides of the equation by -7 to get x.
x=-2.57142857143
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