Equations practice problems - page 161 of 241
Number of problems found: 4813
- Equation 15
Solve equation with variables on both sides: - Simultaneously 5564
The smaller spiral heats the water in 30 hours, and the larger in 20 hours. How long will it take to heat the water if we turn on both coils simultaneously and the smaller coil breaks down after 8 hours of heating? - Representing 5562
The chess group consists of eight boys, representing 40% of all group members. How many girls go to the chess ring? - Orange colour
For the painter to get orange, he has to mix yellow and red in a ratio of 3:4. If he used 8 liters of red, how many liters of orange did he mix? - Gymnasium - classes
Half of the 9th-grade students want to study at secondary technical schools, a quarter at vocational schools, a sixth at gymnasiums, and 3 students do not wish to continue their studies. How many pupils are there in the class? - Daughter and father
"My daughter will be x years old in x²," said Elise's father in 1991 at her birthday party. a) When will the said event occur, and how old will Elise be at that time? b) In what year was Elise born? c) How old was Elise in 1991? - Brick weight
Half the weight of a brick plus 20 pounds equals 1/3 the weight of the brick plus 30 pounds. How much does the brick weigh? - Bed time
Tiffany was five years old; her weeknight bedtime grew by ¼ hours yearly. If her curfew time at age 18 is 11 p.m., what was her bedtime when she was five years old? - Gardeners 5542
Three gardeners mow the meadow for a while. Four gardeners can do it half an hour earlier. How long will it take five gardeners to do it? - Suzan
Susan's age will be after 12 years, four times as much as twelve years ago. How old is Susan now? - Brought 5527
In the evening, four ants counted the crumbs they had brought. The first ant had 1.5 times more than the second, the second ant twice less than the fourth and the third ant twice more than the second. They had 26 crumbs in total. How many crumbs did the t - Number unknown
Adela thought of the two-digit number. She added it to its ten times and got 407. What number does she think? - Unknown numbers The sum of two consecutive natural numbers and their triple is 92. Find these numbers.
- Theatre performances
A total of 15,744 CZK was collected as admission for three theatre performances. The revenue from the second performance was 20% higher than the revenue from the first performance and the revenue from the third performance was 10% lower than the revenue f - Substitution
Solve equations by substitution: x+y= 11 y=5x-25 - Ľé sweets
There are 20 sweets in the bag. Some are chocolate, other coconuts, and the remaining marzipan. Chocolate is four times more than coconut. Marzipan's less than chocolate. How much is in a bag of coconut sweets? - Perpendicular sides
In a right triangle, one perpendicular is 1 m shorter than the hypotenuse. The other perpendicular is 2 m shorter than the hypotenuse. Find the lengths of all sides of the triangle. - Soccer ball
How much does a soccer ball cost, and 6/7 of the price is € 12? - Unknown variable Find the number x, which, if it increases by 2, then its square increases by 21 percent.
- Ratio-cuboid
The lengths of the edges of the cuboid are in the ratio 2:3:6. Its body diagonal is 14 cm long. Calculate the volume and surface area of the cuboid.
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