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7x-(9-4x)=3(x-12)
We simplify the equation to the form, which is simple to understand
7x-(9-4x)=3(x-12)
Remove unnecessary parentheses
7x-9+4x=3*(x-12)
Reorder the terms in parentheses
7x-9+4x=+(+3x-36)
Remove unnecessary parentheses
+7x-9+4x=+3x-36
We move all terms containing x to the left and all other terms to the right.
+7x+4x-3x=-36+9
We simplify left and right side of the equation.
+8x=-27
We divide both sides of the equation by 8 to get x.
x=-3.375
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