# 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?

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

**Showing 0 comments:**

**Be the first to comment!**

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

## Next similar examples:

- The buns

Kate, Zofia and Peter Liked buns. Even today, their grandmother prepare their favorite meal. Katka eats 4 bunches, Žofia 3 and Petra eats 5 buns. Their grandmother said to them, "My inmate will you know how many buns I have been make today, if those you ea - Pears

There were pears in the basket. I took them two fifths and left them in a basket of six. How many pears I took? - Trees

From the total number of trees in the orchard, there are two-fifths pearls and apples are three eighty. The rest of the trees are 9 ceremonial. How many trees are in the set? - Orchard

3/5 of the trees in the orchard are apples, 1/3 are cherries and the remaining five trees are pear. How many trees are in the orchard? - 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? - Classroom

One-eighth of 9th class was interested in studying at a grammar school, at a business academy one sixth, at secondary vocational schools quarter, to SOU one third and the remaining three students were interested in the school of art direction. How many st - Grandmother and grandfather

Grandmother baked cakes. Grandfather ate half, then quarter of the rest ate Peter and Paul ate half of rest. For parents left 6 cakes. How many cakes maked the grandmother? - Bricklayers

8 bricklayers build a house for 630 days. How many bricklayers have to add after 150 days, so then the whole building completed in (next) 320 days? - Simple equation 3

24 = n • 27, solve for n - UN 1

If we add to an unknown number his quarter, we get 210. Identify unknown number. - Equation with fractions

Solve equation: ? It is equation with fractions. - Number

I think the number. If I add to its third seven I get same as when to its quarter add 8. Which is the number? - Equation

Find x: x + 1/2 = 1/3 - Fractions

Three-quarters of an unknown number are 4/5. What is 5/6 of this unknown number? - Equation with x

Solve the following equation: 2x- (8x + 1) - (x + 2) / 5 = 9 - Unknown number 6

Determine x if 1/6 of x is equal to 2/5 of the number 24. - Simple equation

Solve for x: 3(x + 2) = x - 18