# Expression of a variable from the formula + integers - math problems

1. Simplify
Simplify expression - which expression is equivalent to: 3(m + 2) − 4(2m − 9)
2. Collection of stamps
Jano, Rado, and Fero have created a collection of stamps in a ratio of 5: 6: 9. Two of them had 429 stamps together. How many stamps did their shared collection have?
3. Four integers
Fnd four consecutive integers so that the product of the first two is 70 times smaller than the product of the next two.
4. Value
Determine the value of the following exspressions: a) (23-25)·(4-5) b) (97-123):(18+8)
5. Points on circle
In the Cartesian coordinate system with the origin O is a sketched circle k /O; r=2 cm/. Write all the points that lie on a circle k and whose coordinates are integers. Write all the points that lie on the circle I / O; r=5 cm / and whose coordinates are i

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