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-2u+15=2u+3
We simplify the equation to the form, which is simple to understand
-2u+15=2u+3
We move all terms containing u to the left and all other terms to the right.
-2u-2u=+3-15
We simplify left and right side of the equation.
-4u=-12
We divide both sides of the equation by -4 to get u.
u=3
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