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7/B+5=10/5 and you have to cross multiply
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7/B+5=10/5 and you have to cross multiply

User Vladzaba
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(7)/(b+5)=(10)/(5)\\\\10(b+5)=\frac{}{}7\cdot5\\\\10b+50=35\\\\10b=35-50\\\\10b=-15\ \ \ \ |:10\\\\b=-(15)/(10)=-(3)/(2)=-1(1)/(2)
User Luke Wage
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