Let, present age of sarla =x
And present age of sheya =y
Now, as per 1st condition of question
x=2y+7 …..(1)
As per 2nd condition of question
3 years since present
Y=x+19 ….(2)
From equation 1st and 2nd
y−19=2y+7
y=−26
Put y=26 in equation 1st ,we get
x=−45
Hence , this is not possible , age can’t exist negative