Question

Комектесиндерши
1) x: 20 = 2:5;
2) x:18 = 7:9;
3) x:18 = 2; 3;
4) 6: х = 3:7;​

Answer 1

$1) \frac{x}{20} = \frac{2}{5} \\ \frac{x}{4} = 2 \\ x = 8 \\ 2) \frac{x}{18} = \frac{7}{9} \\ \frac{x}{2} = 7 \\ x = 14 \\ 3) \frac{x}{18} = \frac{2}{3} \\ \frac{x}{6} = 2 \\ x = 12 \\ 4) \frac{6}{x} = \frac{3}{7} \\ \frac{2}{x} = \frac{1}{7} \\ x = 14$

Answer 2

1) x=8

2)x=14

3)x=12

4)x=14