13=11+u

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Solution for 13=11+u equation:


13=11+u

We simplify the equation to the form, which is simple to understand 
13=11+u

We move all terms containing u to the left and all other terms to the right. 
-1u=+11-13

We simplify left and right side of the equation. 
-1u=-2

We divide both sides of the equation by -01 to get u. 
u=2

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