# Number unknown

Adela thought the two-digit number, she added it to its ten times and got 407. What number does she think?

**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:

- Number

Determine unknown number if you know that difference between five times and triple of number is 42. - Unknown number xyz

Find the number that its triple is 24. Solve by equation. - I think

I think a number. When I multiply it by five, and after that I subtract 477, I get the same number as if I multiplied it twice. What number do I think? - What is missing (1000)

What number is to add to get 1000? - Roman numerals 2-

Subtract up the number writtens in Roman numerals. Write the results as a roman numbers. - Roman numerals +

Add up the number writtens in Roman numerals. Write the results as a decimal number. - Cords joining

Mum needs 6 cords long 360cm long. How many does she need when they are sold at 9 meters and does not want to join it up? - Roman numerals

Write numbers written in Roman numerals as decimal. - Summand

One of the summands is 186. The second is 15 more. Determine the sum of the summands. - If-then equation

If 5x - 17 = -x + 7, then x = - Hotel

The rooms in the mountain hotel are double and triple. Double rooms are 25 and triple are 17 more. How many rooms are there in this hotel? - Eq1

Solve equation: 4(a-3)=3(2a-5) - Simple equation

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

1/3 poppy cake, 1/3 apple, 15 pieces of cheese. How many are totally cakes? - Doctors

In the city operates 171 doctors. The city has 128934 citizens. How many citizens are per one doctor? - Triangle

Prove whether you can construct a triangle ABC, if a=9 cm, b=10 cm, c=4 cm. - Orchard

9 trees in 5 lines grows in the orchard. How many trees are in the orchard?