This is my first time on this site. I do hope I'm submitting my question in the correct way.

Here is the question:

June spent 3/5 of her money in the first week and 1/3 of the remainder in the second week. She spent $110 altogether. How much money did she have left?

I've solved the problem using Singapore Math styled model math. Not sure how to show my work using the model. But in the end I solved for 1/15 of the $110 and then 4/15. The answer is $40.

I wanted to figure out how do solve it using algebraic equations instead of model math, but I can't seem to get it.

Can you help me please?

Ibis