Equation - examples - page 40
Half of the bar is green, the third is yellow and the remaining 40cm is red. How long is a bar?
- Cleaning windows
Cleaning company has to wash all the windows of the school. The first day washes one-sixth of the windows of the school, the next day three more windows than the first day and the remaining 18 windows washes on the third day. Calculate how many windows ha
- Raw meat
In the school cafeteria for one lunch, they prepare 490 servings of 50 g of boiled meat. Meat loses 30% of its weight by cooking. How many kilograms of raw meat must the school canteen prepare for this lunch to cook?
- Red balls
In the bag there are 3 red, 12 blue and 8 green balls. How many red balls we must be attached to the bag if we want the probability of pulling out the red balls was 20%?
Average age of 24 players and a coach of one team is 24 years. The average age of players without a coach is 23 years. How old is the coach?
- UN 1
If we add to an unknown number his quarter, we get 210. Identify unknown number.
- Equation 11
Solve equation: ?
- Unknown number
I think number. If subtract from the twelfth square the ninth square I get a number 27 times greater than the intended number. What is this unknown number?
- Two lands
The common area of the two neighboring lands is 964 m2. The second land is 77 m2 smaller than twice the size of the first land. Find the areas of each land.
- Three granaries
Three granaries hold 7,800 metric cent (q) of grain. In the first, 70 tonnes of grain was more than the second and in the third it was 120 tonnes less than in the second. How many grain were in each granary?
Susan is 3 years and as she will be old as Teodor now him will be 11. How old is Teodor today?
- King's birthday
To celebrate the king's birthday workers fire 1/5 all purchased rockets. To celebrate the Queen's birthday fire 1/6 of the remaining rockets and to celebrate the birthday of king's son remaining 15,000 rockets. How many rockets they purchased?
- Difference AP 4
Calculate the difference of the AP if a1 = 0.5, a2 + a3 = -1.1
- Right triangle eq2
Find the lengths of the sides and the angles in the right triangle. Given area S = 210 and perimeter o = 70.
If the number of elements increase by 3, it increases the number of combinations of the second class of these elements 5 times. How many are the elements?
write the following proportion 8 is to 64 as to 2 is to x
- Unknown number xyz
Find the number that its triple is 24. Solve by equation.
If the number of elements is decreased by two the number of permutations is decreased 30 times. How many elements are?
- Boys and girls
There are 28 girls in the hall. 5/7 of all children are boys. How many children and how many boys are there?
- Savings 2
Jozef and Michael saved 46 euros together. Michael saved 22 euros more than Jozef. How much did save each of them?
Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?