If the solution of the equation 9x = 17 KX about X is a positive integer, find the value of K

If the solution of the equation 9x = 17 KX about X is a positive integer, find the value of K

9x=17-kx
(9+k)x=17
x=17/(9+k)
X is a positive integer
K = 8 or K = - 8

On the system of linear inequalities of one variable,
Divide a packet of chocolates to x children, each of whom is divided into 5 pieces. As a result, there are 28 pieces left. If each child in front is divided into 6 pieces, and the rest is given to the last child, then the last child will get one piece of chocolates

5x + 28 and 34-x

If each data of a group of data is expanded by 100 times, and the new average 2 of the group of data is calculated by subtracting 50 at the same time, then the average of the original data is

There are n items in the data, and the average is e
100e*n - 50n = 2n
The solution is e = 0.52

Simple calculation: 8 of 45 and 11 - (2 of 30 and 5 + 8 of 11)

45 8 / 11 - (30 2 / 5 + 8 8 / 11)
=45 and 8 / 11-30 and 2 / 5-8 and 8 / 11
=45 and 8 / 11-8 and 8 / 11-30 and 2 / 5
=37-30 and 2 / 5
=6 and 3 / 5

How much did it cost?
"What's the matter?" Mrs. O'Neill said to the mathematically minded policeman Clancy, "I bought a few yellow bananas for 30 cents a bunch and the same number of red bananas for 40 cents a bunch. However, when I divided the money equally, I bought two more bananas than before. It's a strange thing."
"How much did you spend?" asked Clancy
”Answered Mrs. O'Neill
Do you know how much Mrs. O'Neill spent?

Let's buy x bunches of yellow banana, because the unit price of yellow banana and red banana is the same (30x + 40x) / (2 * 30) + (30x + 40x) / (2 * 40) = 2x + 235x / 30 + 35x / 40 = 2x + 2140x + 105x = 240x + 2405x = 240x = 48, that is, we bought 48 bunches of yellow banana and 48 bunches of red banana before, then the total cost before: 48 * 30 + 48 * 40 = 48 * 70 = 3360 cents = 33 US $6

1,2,5,14,41, (), () to find the law

81,243
The adjacent differences are: 0 power of 3, 1 power of 3, 2 power of 3, 3 power of 3
If you are satisfied, please click [satisfied] in the upper right corner~~
Your adoption is my driving force~~
Have a good time (*^__ ^*(hee hee

Solving equation 5x + 1 / 10 * 6 = 2 / 3
Detailed steps should be taken

5x=2/3-3/5
5x=1/15
x=1/75

I like reading story books, composition newspapers, fairy tales and other extracurricular books

I like reading story books, fairy tales and other extracurricular books

What is 2002 + 2004 + 2006 +... + 2050

[solution] this is the sum of the first 20 items of the arithmetic sequence with A1 = 2002. A25 = 2050, n = 25 and tolerance equal to 2. According to the sum formula of the first n items of the arithmetic sequence, the original formula = 25 (2002 + 2005) / 2 = 25 4052 / 2 = 50650 can be obtained

Simple calculation of 10.75 + 0.4 + 9.86

10.75+0.4+9.86
=10.75+0.4+(10-0.14)
=10.75+0.4+10-0.14
=(10.75+10)+(0.4-0.14)
=20.75+0.26
=21.01