[tex]\displaystyle\bf\\\frac{a-7b}{b} =1\\\\\\\frac{a}{b} -\frac{7b}{b} =1\\\\\\\frac{a}{b} -7=1\\\\\\\boxed{\frac{a}{b} =8} \ \ \ \Rightarrow \ \ \ \boxed{\frac{b}{a} =\frac{1}{8} =0,125}\\\\\\1)\\\\\frac{a}{b} =8\\\\\\2)\\\\\frac{3a+2b}{a} =\frac{3a}{a} +\frac{2b}{a} =3+2\cdot \frac{b}{a} =3+2\cdot0,125=3+0,25=3,25[/tex]
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[tex]\displaystyle\bf\\\frac{a-7b}{b} =1\\\\\\\frac{a}{b} -\frac{7b}{b} =1\\\\\\\frac{a}{b} -7=1\\\\\\\boxed{\frac{a}{b} =8} \ \ \ \Rightarrow \ \ \ \boxed{\frac{b}{a} =\frac{1}{8} =0,125}\\\\\\1)\\\\\frac{a}{b} =8\\\\\\2)\\\\\frac{3a+2b}{a} =\frac{3a}{a} +\frac{2b}{a} =3+2\cdot \frac{b}{a} =3+2\cdot0,125=3+0,25=3,25[/tex]