Question

Допоможіть будь ласка! Буду дуже вдячна! Чим скоріше тим краще. Дам 50 балів!!

Answer 1

Объяснение:

(a-2b)/b =5;  a-2b=5b;  a=7b

1) a/b = 7b/b = 7

2) (3a+2b)/a = (3*7b+2b)/7b = (21b+2b)/7b = 23/7 = 3 2/7.

Answer 2

$\displaystyle\bf\\\frac{a-2b}{b} =5\\\\\\\frac{a}{b} -\frac{2b}{b} =5\\\\\\\frac{a}{b} -2=5\\\\\\\frac{a}{b} =5+2\\\\\\\boxed{\frac{a}{b} =7}\\\\2)\\\\\frac{a}{b} =7\\\\\\\frac{b}{a} =\frac{1}{7} \\\\\\\frac{3a+2b}{a} =\frac{3a}{a} +\frac{2b}{a} =3+2\cdot\frac{b}{a}=3+ 2\cdot\frac{1}{7} =\\\\\\=3+\frac{2}{7}=3\frac{2}{7} \\\\\\\boxed{\frac{3a+2b}{a} =3\frac{2}{7} }$