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OpenStudy (anonymous):
u=-b+21 u=-2b+30
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OpenStudy (mathmale):
Welcome to OpenStudy! So that someone can best help you, please include the instructions for this problem.
OpenStudy (cuanchi):
-b+21=-2b+30 -b+2b=30-21 b=30-21 b=9 u=-b+21 u=-9+21 u=12
OpenStudy (mathmale):
@cuanchi: would you kindly guide others towards finding their own solutions, and not do their work for them or give them the answer without any involvement on their part.
OpenStudy (cuanchi):
sure!!
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