# Lookout tower

How high is the lookout tower? If each step was 3 cm lower, 60 more were on the lookout tower. If it were 3 cm higher again, it would be 40 less than it is now.

## Correct answer:

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

**algebra**- quadratic equation
- equation
- system of equations
- expression of a variable from the formula
**basic functions**- reason
**numbers**- natural numbers

### Units of physical quantities:

### Grade of the word problem:

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