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Solve for uu.\newline−9−4u=−u-9 - 4u = -u\newlineu = ____

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Full solution

Q. Solve for uu.\newline−9−4u=−u-9 - 4u = -u\newlineu = ____
  1. Start with equation: Start with the equation −9−4u=−u-9 - 4u = -u. We want to get all the terms with uu on one side and the constant terms on the other side. Add 4u4u to both sides to move the uu terms to one side. −9−4u+4u=−u+4u-9 - 4u + 4u = -u + 4u Simplify the equation. −9=3u-9 = 3u
  2. Add and simplify: Now, divide both sides by 33 to solve for uu. \newline−93=3u3-\frac{9}{3} = \frac{3u}{3}\newlineSimplify the equation.\newline−3=u-3 = u

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