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-7+2u=9
We simplify the equation to the form, which is simple to understand
-7+2u=9
We move all terms containing u to the left and all other terms to the right.
+2u=+9+7
We simplify left and right side of the equation.
+2u=+16
We divide both sides of the equation by 2 to get u.
u=8
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