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4=-2(u-15)+12
We simplify the equation to the form, which is simple to understand
4=-2(u-15)+12
Reorder the terms in parentheses
4=+(-2u+30)+12
Remove unnecessary parentheses
+4=-2u+30+12
We move all terms containing u to the left and all other terms to the right.
+2u=+30+12-4
We simplify left and right side of the equation.
+2u=+38
We divide both sides of the equation by 02 to get u.
u=19
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