Question

A)5 1/4 : (4,8s)=3 1/8 : 7,5 б)2 1/2: 8 1/3=5,4 : (2,7c) решите уравнение

Answer 1

$a)5 \frac{1}{4} \div (4.8s) = 3 \frac{1}{8} \div 7.5 \\ \\ 5 \frac{1}{4} \times 7.5 =( 4.8s) \times 3 \frac{1}{8} \\ \\ \frac{21}{4} \times \frac{15}{2} = \frac{24}{5} s \times \frac{25}{8} \\ \\ \frac{315}{8} = 15s \\ \\ 15s = \frac{315}{8} \\ \\ s = \frac{315}{8} \div 15 \\ \\ s = \frac{21}{8} \\ \\ s = 2 \frac{5}{8}$

$b)2 \frac{1}{2} \div 8 \frac{1}{3} = 5.4 \div (2.7c) \\ \\ 2 \frac{1}{2} \times (2.7c) = 8 \frac{1}{3} \times 5.4 \\ \\ \frac{5}{2} \times ( \frac{27}{10}c) = \frac{25}{3} \times \frac{27}{5} \\ \\ \frac{27}{4} c = 45 \\ \\ c = 45 \div \frac{27}{4} \\ \\ c = 6 \frac{2}{3}$