3. On the coordinate plane, lines of the form $y=a x+b$ are drawn, where $a$ and $b$ are natural numbers from 1 to 7. Among all the intersection points of these lines, select the point with the greatest sum of coordinates. Write the answer in the form $(x ; y)$.
Answer: $(6 ; 43)\|(6,43)\| 6 ; 43 \| 6,43$

## Examples of answer notation:

$(-4 ; 5)$

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