Final answer:
The calculation of 50 minus 70 results in -20. This is because when you subtract a larger number from a smaller one, the result is a negative value representing the difference.
Step-by-step explanation:
The result of subtracting 70 from 50 is calculated as 50 - 70 which equals to -20. Therefore, the correct answer to "What is the result of 50-70?" is option 2) -20.
To arrive at this result, you can think of having 50 units and then taking away 70 units. Since you can't take away more than you have, you end up owing the difference, which is 20 units. However, because you owe this amount, it is represented as a negative number, hence -20.