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17-12-2014
Mathematics

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

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17-12-2014

[tex]\frac{7}{b+5}=\frac{10}{5}\\\\10(b+5)=\frac{}{}7\cdot5\\\\10b+50=35\\\\10b=35-50\\\\10b=-15\ \ \ \ |:10\\\\b=-\frac{15}{10}=-\frac{3}{2}=-1\frac{1}{2}[/tex]

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