# Painting rooms

If Daniel paints for three hours daily, he completes it in 7.5 days. How many hours a day would he have to work to finish the job 1.5 days earlier?

## 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
**basic functions**- ratio
- inverse proportion
- direct proportionality
- simple proportion

### Units of physical quantities:

#### Themes, topics:

### Grade of the word problem:

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