Question 1141469
Five years ago he was x, now he is 2x so x+5=2x and x=5.  He is now 10.
When he was 5, his mother was 30, 35-5.
When she is 50, in 15 years, he will be 25.
She was 25 when he was born
The difference in ages is 25, since she was 25 when he was born.