Question

Задумали число, увеличили его в 8 раз, уменьшили сначала на 12, а затем в 7 раз и получили 4. Какое число задумали? РЕШИТЕ С ПОМАШЬЮ УРАВНЕНИЯ.

Answer 1

Пусть задуманное число =х, тогда:(х*8-12)/7=4, 8х-12=4*7,    8х-12=28,  8х=40,  х=5.

Answer 2

(Х*8-12)/7=4
8Х-12=7*4
8Х=28+12
8Х=40
Х=40:8
Х=5

Answer 3

Problem Analysis

To solve this problem, we need to find the number that was initially thought of. We are given the following information: - The number was increased by 8 times. - Then it was decreased by 12. - Finally, it was decreased by 7 times, resulting in 4.

Let's assume the initial number is x.

Solution

We can solve this problem by setting up an equation based on the given information and solving for x.

1. The number was increased by 8 times: 8x 2. Then it was decreased by 12: 8x - 12 3. Finally, it was decreased by 7 times: (8x - 12) / 7

According to the given information, this expression should equal 4:

(8x - 12) / 7 = 4

To find the value of x, we can solve this equation.

Solving the Equation

To solve the equation, we can start by multiplying both sides by 7 to eliminate the denominator:

8x - 12 = 4 * 7

Simplifying the equation:

8x - 12 = 28

Next, we can add 12 to both sides to isolate the variable:

8x = 28 + 12

Simplifying further:

8x = 40

Finally, we can divide both sides by 8 to solve for x:

x = 40 / 8

Simplifying the division:

x = 5

Therefore, the number that was initially thought of is 5.

Answer

The number that was initially thought of is 5.