Question

Как решить задачу уравнением Ааааааарман задумал число ,увеличел его в 7 раз,вычел27,уменьшил в 4 раза,прибавил38 и получил 47.Какое число задумал Арман?

Answer 1

47-38=9
9*4=36
36+27=63
63:7=9
ответ: Арман задумал число 9.
Проверка:
9×7=63
63-27=36
36÷4=9
9+38=47
Не увидела, нужно было с уравнением.
С уравнением:
(х*7-27):4+38=47
(х*7-27):4=47-38
(х*7-27):4=9
х*7-27=9*4
х*7-27=36
х*7=36+27
х*7=63
х=63:7
х=9

Answer 2

Problem Analysis

To solve this problem, we need to find the number that Arman originally had in mind. We are given a series of operations that Arman performed on the number, and the final result he obtained. We can work backwards from the final result to determine the original number.

Solution

Let's break down the problem step by step:

1. Arman increased the number by 7 times. 2. He then subtracted 27 from the result. 3. He further reduced the number by 4 times. 4. Finally, he added 38 to the result and obtained 47.

To find the original number, we need to reverse these operations. Let's denote the original number as x.

1. Arman increased the number by 7 times: 7x. 2. He subtracted 27 from the result: 7x - 27. 3. He reduced the number by 4 times: (7x - 27)/4. 4. Finally, he added 38 to the result and obtained 47: (7x - 27)/4 + 38 = 47.

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

((7x - 27)/4) + 38 = 47

Let's solve this equation step by step:

1. Multiply both sides of the equation by 4 to eliminate the fraction:

7x - 27 + 4(38) = 4(47)

Simplifying:

7x - 27 + 152 = 188

2. Combine like terms:

7x + 125 = 188

3. Subtract 125 from both sides:

7x = 63

4. Divide both sides by 7:

x = 9

Therefore, the number that Arman originally had in mind is 9.