# Unknown number 5

I think unknown number. If we enlarge it five times then subtract 3 and result decreases by 75% we get the number by one greater than the number I think. What number am I thinking?

Result

x =  7

#### Solution:

(5x-3)*(1-75/100) = 1+x

25x = 175

x = 7

Calculated by our simple equation calculator.

Leave us a comment of example and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

#### To solve this example are needed these knowledge from mathematics:

Our percentage calculator will help you quickly calculate various typical tasks with percentages. Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

## Next similar examples:

1. One-third
A one-third of unknown number is equal to five times as great as the difference of the same unknown number and number 28. Determine the unknown number.
2. Percent
Calculate how many % is the number 26.25 less than the number 105.
3. Dropped sheets
Three consecutive sheets dropped from the book. The sum of the numbers on the pages of the dropped sheets is 273. What number has the last page of the dropped sheets?
4. Ski class
Class attend 30 boys and some number of girls. Ski training was attended by 28 boys and all the girls, which was 95% of all students. How many girls attend this class? How many percent is that?
5. The ball
The ball was discounted by 10 percent and then again by 30 percent. How many percent of the original price is now?
6. Goods
To the market is introducing a new product, the first week is sold at a reduced price. 8 products is sell at an entry price same as 5 products at the normal price. How much % is reduced price less than the current price for this product?
7. Apples 2
James has 13 apples. He has 30 percent more apples than Sam. How many apples has Sam?
8. Tickets 3
A total of 645 tickets were sold for the school play. They were either adult tickets or student tickets. There were 55 fewer student tickets sold than adult tickets. How many adult tickets were sold?
9. Norm
Three workers planted 3555 seedlings of tomatoes in one dey. First worked at the standard norm, the second planted 120 seedlings more and the third 135 seedlings more than the first worker. How many seedlings were standard norm?
10. Class
In 7.C clss are 10 girls and 20 boys. Yesterday was missing 20% of girls and 50% boys. What percentage of students missing?
11. Cancer
Of the 80 people 50 people ill cancer. What percentage of people isn't ill?
12. Girls
The children's competition was attended by 63 girls, which is 30% of all children's participants. How many children attended this competition?
13. Test points
If you earned 80% of the possible 40 points, how many points did you miss to get 100%?
14. TVs
Production of television sets increased from 3,500 units to 4,200 units. Calculate the percentage of production increase.