# Birthdays 9011

Three sisters have birthdays today, and their ages are in the ratio of 2:3:4. In two years, their ages will be in the ratio of 5:7:9. Find what their ages will be in four years.

## Correct answer:

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### You need to know the following knowledge to solve this word math problem:

**algebra**- equation
- expression of a variable from the formula
**arithmetic**- division
**basic functions**- ratio
- reason
**numbers**- fractions

### Units of physical quantities:

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