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Mathematics 8 Online
OpenStudy (anonymous):

u=-b+21 u=-2b+30

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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