When mei does 17 push-ups and 6 sit-ups, it takes a total of 35 seconds. in comparison, she needs 41 seconds to do 20 push-ups and 7 sit-ups. how long does it take mei to do each kind of exercise?

It takes 1 seconds for push-ups and 3 seconds for sit-ups for Mei to do exercise.

Step-by-step explanation:

Given:

Let the time taken for push-ups be 'x'.

Let the time taken for sit-ups be 'y'.

Now Given:

17 push-ups and 6 sit-ups, it takes a total of 35 seconds.

So we can say that;

Also Given:

41 seconds to do 20 push-ups and 7 sit-ups.

so we can say that;

Now Multiplying equation 1 by 7 we get;

Now Multiplying equation 2 by 6 we get;

Now Subtracting equation 3 from equation 4 we get;

Now substituting the value of x in equation 1 we get;

Hence It takes 1 seconds for push-ups and 3 seconds for sit-ups for Mei to do exercise.