Question

Если к 11 прибавить 21,то полученное число будет в 8 раз больше задуманного числа. Задуманное число......? Если из 90 вычесть 18, то полученное число будет в 9 раз больше задуманного числа. Задуманное число.....? Если 35 разделить на 7,то полученное число будет на 15 меньше задуманного числа. Задуманное число....?

Answer 1

1) (11+21)÷8=4 перевое задуманное число
2)(90-18)÷8=8второе
3) 35÷5+15=22третье

Answer 2

11+21=8*х
х=32/8=4
90-18=9*у
у=72/9=8
35/7=z-15
z=5+15=20

Answer 3

Task 1: Adding 11 and 21

To find the number that, when added to 11, results in a number that is 8 times larger than the original number, we can set up the following equation:

11 + x = 8x

Simplifying the equation, we get:

11 = 7x

To solve for x, we divide both sides of the equation by 7:

x = 11/7

Therefore, the number is 11/7.

Task 2: Subtracting 18 from 90

To find the number that, when subtracted from 90, results in a number that is 9 times larger than the original number, we can set up the following equation:

90 - x = 9x

Simplifying the equation, we get:

90 = 10x

To solve for x, we divide both sides of the equation by 10:

x = 90/10

Therefore, the number is 9.

Task 3: Dividing 35 by 7

To find the number that, when divided by 7, results in a number that is 15 less than the original number, we can set up the following equation:

x/7 = x - 15

To solve for x, we can multiply both sides of the equation by 7:

x = 7(x - 15)

Expanding the equation, we get:

x = 7x - 105

Bringing like terms to one side of the equation, we get:

6x = 105

To solve for x, we divide both sides of the equation by 6:

x = 105/6

Therefore, the number is approximately 17.5.

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