# Jan

Jan is 13 years and Peter 21 years old. For how many years will their ages in the ratio of 7:9?

**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 - Points

Gryffindor won 437 points. How many points obtained by each of the faculties if they were split at a ratio of 5: 7: 3: 4? - Quiz

Tested student answered correctly on a 4/ 8 questions. Wrong answers was 16. How many questions answered? - Pears

There were pears in the basket, I took two-fifths of them, and left six in the basket. How many pears did I take? - 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? - 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 - Norm

Three workers planted 3555 seedlings of tomatoes in one dey. First worked at the standard norm, the second planted 120 seedlings more and the third 135 seedlings more than the first worker. How many seedlings were standard norm? - Runners

For three runners (on the first to third place) is prepared 30 chocolate that they be distributed in the ratio of 3 : 2 : 1 How much chocolate will get everyone? - 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 with fractions

Solve equation: ? It is equation with fractions. - One-third

A one-third of unknown number is equal to five times as great as the difference of the same unknown number and number 28. Determine the unknown number. - Withdrawal

If I withdrew 2/5 of my total savings and spent 7/10 of that amount. What fraction do I have in left in my savings? - Find unknown

Find unknown numerator: 4/8 + _/8 = 1 - Fraction to decimal

Write the fraction 3/22 as a decimal. - Equation 15

Solve equation with variables on both sides: - Equation

Solve the equation: 1/2-2/8 = 1/10; Write the result as a decimal number. - Simple equation

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