Question

526. 6кл. 1)3x/4=9/20. 2)8/7x=24/35. 3)18/52=2x/13. 4)25/44=15/4x

Answer 1

$\frac{3x}{4} = \frac{9}{20} \\ 60x = 36 \\ x = \frac{36}{60} = \frac{6}{10} = 0.6$

$\frac{8}{7x} = \frac{24}{35} \\ 7x \times 24 = 8 \times 35 \\ 168x = 280 \\ x = \frac{280}{160} = \frac{7}{4} = 1.75$

$\frac{18}{52} = \frac{2x}{13} \\ 104x = 234 \\ x = \frac{234}{104} = 2.25$

$\frac{25}{44} = \frac{15}{4x} \\ 100x = 660 \\ x = 660 \div 100 = 6.6$