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4u+7=13
We simplify the equation to the form, which is simple to understand
4u+7=13
We move all terms containing u to the left and all other terms to the right.
+4u=+13-7
We simplify left and right side of the equation.
+4u=+6
We divide both sides of the equation by 4 to get u.
u=1.5
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