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3(u-1)=9u+1-2(-2u-4)
We simplify the equation to the form, which is simple to understand
3(u-1)=9u+1-2(-2u-4)
Reorder the terms in parentheses
+(+3u-3)=9u+1-2*(-2u-4)
Remove unnecessary parentheses
+3u-3=+9u+1-2+*(-2u-4+)
Reorder the terms in parentheses
+3u-3=9u+1+(+4u+8)
Remove unnecessary parentheses
+3u-3=+9u+1+4u+8
We move all terms containing u to the left and all other terms to the right.
+3u-9u-4u=+1+8+3
We simplify left and right side of the equation.
-10u=+12
We divide both sides of the equation by -10 to get u.
u=-1.2
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