Question

Число 45 уменьшили в 9 раз, вычли неизвестное число и в результате получили 4. Найди неизвестное число. Нужно решить уравнением. Спасибо!

Answer 1

45/9=5
5-4=1
От 5 вычли число 1 и в итоге получилось 4
Неизв. число: 1

Answer 2

45:9-x=4
5-x=4
x=5-4
x=1

Answer 3

Problem Analysis

We are given that the number 45 was reduced by a factor of 9, an unknown number was subtracted, and the result was 4. We need to find the unknown number by solving the equation.

Solution

Let's denote the unknown number as x. According to the problem, the equation can be written as:

45 / 9 - x = 4

To find the value of x, we can simplify the equation step by step:

1. Divide 45 by 9: 45 / 9 = 5. 2. Subtract x from 5: 5 - x = 4.

Now, we can solve the equation for x:

5 - x = 4

To isolate x, we can subtract 4 from both sides of the equation:

5 - 4 = x

Simplifying further:

1 = x

Therefore, the unknown number x is equal to 1.

Answer

The unknown number in the equation is 1.