# Unknown number

Determine the unknown number, which double of its fourth square is equal the fifth its square.

Result

x =  2

#### Solution:

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

Be the first to comment!

## Next similar examples:

1. Unknown number 17
Milada said, I am thinking of a number such that I evaluate expression x1/3, the value of the expression would be 5. Which number Milada thinking?
2. Divisible by 5
How many three-digit odd numbers divisible by 5, which are in place ten's number 3?
3. Powers
Is true for any number a,b,c equality:? ?
4. Shots
Determine the percentage rate of keeper interventions if from 32 shots doesn't caught four shots.
5. Holidays - on pool
Children's tickets to the swimming pool stands x € for an adult is € 2 more expensive. There was m children in the swimming pool and adults three times less. How many euros make treasurer for pool entry?
6. Simplify 2
Simplify expression: 5ab-7+3ba-9
7. Cancer
Of the 80 people 50 people ill cancer. What percentage of people isn't ill?
8. Candy
Peter had a sachet of candy. He wanted to share with his friends. If he gave them 30 candies, he would have 62 candies. If he gave them 40 candies, he would miss 8 candies. How many friends did Peter have?
9. Waiting room
In the waiting room are people and flies. Together they have 15 heads and 50 legs (fly has 6 legs). How many people and flies are in the waiting room?
10. Powers
Express the expression ? as the n-th power of the base 10.
11. Enrollment
The enrollment at a local college increased 4% over last year's enrollment of 8548. Find the increase in enrollment (x1) and the current enrollment (x2).
12. Simple equations
Solve system of equations: 5x+3y=5 5x+7y=25
13. One half
One half of ? is: ?
14. Greg and Bill
Greg is 18 years old. He is 6 less than 4 times Bill's age. How old is Bill?
15. TVs
Production of television sets increased from 3,500 units to 4,200 units. Calculate the percentage of production increase.
16. Equations
Solve following system of equations: 6(x+7)+4(y-5)=12 2(x+y)-3(-2x+4y)=-44
17. Percents - easy
How many percent is 432 out of 434?