Question

1)6:7=?:14 2)?:15=10:21

Answer 1

1. 6÷7 = 0,857143

0,857143•14 = 12,000002

ответ: 6÷7=12,000002÷14

2. 10÷21 = 0,47619

15•0,47619 = 7,14285

ответ: 7,14285÷15=10÷21

Answer 2

Ответ:

$1)12 \\ 2)7 \frac{1}{7}$

Пошаговое объяснение:

$1)6 \div 7 = x \div 14 \\ 7x = 14 \times 6 \\ 7x = 84 \\ x = 12 \\ 2)x \div 15 = 10 \div 21 \\21x = 150 \\ x = 7 \frac{1}{7}$

главное помнить правило, что если умножаешь крайние члены ( пропорций ) и приравниваешь на умноженные друг на друга средние члены то выходит одно и то же значение

Answer 3

It looks like you're trying to solve a couple of proportion equations. Let's break down each equation and solve for the missing values.

1. 6:7 = ?:14 This equation is comparing two ratios: 6:7 and ?:14. To find the missing value, we can set up a proportion:

6 / 7 = x / 14

Cross-multiply and solve for x:

6 * 14 = 7 * x 84 = 7x x = 84 / 7 x = 12

So, the missing value is 12.

2. ?:15 = 10:21 Similar to the first equation, we can set up a proportion:

x / 15 = 10 / 21

Cross-multiply and solve for x:

21x = 10 * 15 21x = 150 x = 150 / 21 x = 7.14 (approximately)

So, the missing value is approximately 7.14.