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How do you solve for #u# in the equation #-9 + u = 4u#?

1 Answer

Mar 12, 2018

#u=-3#

Explanation:

#-9+u=4u#

#=> -9=4u-u#

#=> -9=3u#

#=> -9/3=u#

#=> (-cancel9^3)/cancel3=u#

#=> -3=u#

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