P5 Whole numbers

Sandra had twice as many apples as oranges at first. She removed 4 apples and 3 oranges each time. In the end, there were 18 apples and 1 orange left. How many fruits did Sandra have at first?

My solution:

https://docs.google.com/document/pub?id=1EaD59T5uGgvxYgr-aFAMM6oqmF12fmQoBdd8Z4H_-20