Answer:
Option 2 is correct that could be used to solve the problem.
Step-by-step explanation:
Present age of Mary is x
And present age of John is y
Since, john is 5 years older than Mary hence, we get
y=x+5
In 10 years twice john's age is decreased by Mary's age by 35
2(y+10)-(x+10)=35
hence, Option 2 is correct which could be use to solve the problem.