Equations practice problems - page 45 of 212
An equation is a statement that asserts the equality of two expressions, which are connected by the equals sign =. Solving an equation containing variables consists of determining which values of the variables make the equality true. The variables for which the equation has to be solved are also called unknowns, and the values of the unknowns that satisfy the equality are called solutions of the equation.Number of problems found: 4221
- Substituted 65024
Which number should be substituted for the variable and in the equation: 4x² (7-x) = a-3- (x-2), so that the root of the equation is the number 5? - Bratislava 64954
A truck drove from Bratislava to Banská Bystrica at a speed of 30 km/h. At the same time, a tractor drove at a speed of 40 km/h. The tractor arrived in Banská Bystrica 1 hour and 45 minutes earlier than the truck. What is the distance between the cities? - Husband 64914
Milan, Sara's husband, is four years older and twice as old as she was 17 years ago. How old are they? - Nearest 64894
We can write the number 1003 in the form 7n + 2. Which can we write the nearest number in this form?
- Collection 64884
Five friends compared how much old iron they brought to the collection. On average, it was 55 kg, but Ivan got only 43 kg. How many kg on average did they bring without Ivan? - Mr Juma
Mr. Juma paid his workers as follows. He gave 1/6 to the first, 2/3 of the remainder to the second, and 2400 to the third worker. How much money did he have at the beginning? - Magnitudes 64704
The triangle ABC determines the size of the sides a and b and the magnitudes of the interior angles β and γ, given c = 1.86 m, the line on the side c is 2.12 m, and the angle alpha is 40 ° 12 '. - Containing 64604
The metal casting consisted of copper and zinc. If we remelted it with 3 kg of pure copper, we would get an alloy containing 80% copper. Instead, we remelted the casting with 3 kilograms of pure zinc, so the resulting alloy contained only 50% copper. Dete - Opened 64544
We can fill the pool with two inflow pipes. The first pipe fill in 24 hours and the second in 16 hours. How long did the pool fill if the first tube was open for the first 4 hours and then we opened both inlets?
- Passenger 64534
A passenger car drove a highway section at a constant speed. At a speed of 20 km/h higher, the ride would take 6 minutes less. At a speed of 20 km/h lower, it would take 9 minutes more. Calculate the length of the highway section. - Construction 64524
The bricklayer and the apprentice will build the wall in 6 hours. If the bricklayer worked alone, the wall construction would take him 5 hours shorter than the apprentice. How long before the wall would the bricklayer build himself? - Four-digit 64504
Writing a four-digit number ends with the number 5. If we move this number to the first place, we get a number 531 larger than the original. Specify the original number. - Collected 64494
A group of scouts works in the woods. A third of them cleaned the stream. A quarter collected timber, and the remaining ten planted trees. How many scouts were on the brigade? - Amount 64464
There are 12,000 tons of coal on the first dome and 2,200 tons on the second. They take 80 tons from the first kick every day and 60 tons from the second. How many days will the same amount of coal be on both kicks?
- Missing denominator
3 1/3 + 4/? =4 2/15 What is the missing number in the equation? - Increased 64324
The number of books in the city library increased by 0.2% in 2008 and 0.6% in 2009. At the same time, the total number of books remained less than 300,000. How many books were added to the city library in 2009? - Mountain 64314
The hiker set out on a hike at 5 km/h. After 30 minutes, a cyclist on a mountain bike set off on the same route at 20 km/h. How many minutes will the cyclist overtake the tourist? - A beauty
A beauty supply company has 53 liters of 5% hydrogen peroxide solution on hand. The company also has a nearly limitless amount of a solution that contains 35% hydrogen peroxide. How many liters of the 35% hydrogen peroxide solution should the company add - Employees 64184
The company employs 20% more women than men and 240 women. How many employees are there?
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