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9+u/4=13
We simplify the equation to the form, which is simple to understand
9+u/4=13
Simplifying:
9 + 0.25u=13
We move all terms containing u to the left and all other terms to the right.
+ 0.25u=+13-9
We simplify left and right side of the equation.
+ 0.25u=+4
We divide both sides of the equation by 0.25 to get u.
u=16
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