Answer:
35 sit ups and 10 pullups
Step-by-step explanation:
so we know that for 7 situps you do 2 pullups
so the possible values would be
7,2
14,4
21, 6
28, 8
35, 10
and so on
so now you just look at which two numbers have a difference of 25
when subtracting them, you'll notice that 35 and 10 have a difference of 25.