39=9u--12

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Solution for 39=9u--12 equation:


39=9u--12

We simplify the equation to the form, which is simple to understand 
39=9u+12

We move all terms containing u to the left and all other terms to the right. 
-9u=+12-39

We simplify left and right side of the equation. 
-9u=-27

We divide both sides of the equation by -09 to get u. 
u=3

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