Question

Какое число нужно написать в числителе, чтобы равенство стало верным? 7\21 = х\3

Answer 1

Пропорция 7/21=х/3 решается:
(7*3)/21=21/21=1
Ответ:х=1

Answer 2

Ответ : 7/21 : 7 = 1/3

Answer 3

Finding the Value of x in the Numerator

To find the value of x in the numerator to make the equation 7/21 = x/3 true, we can use the following approach:

Step 1: Set up the equation and solve for x.

The given equation is 7/21 = x/3. To solve for x, we can cross-multiply and solve for x.

Step 2: Cross-multiply and solve for x.

Cross-multiplying the given equation gives us: 7 * 3 = 21 * x

Solving for x: 21x = 21 x = 1

Therefore, the value that needs to be written in the numerator to make the equation true is 1.

This solution is based on the mathematical principle of cross-multiplication, which is a standard method for solving proportions.