So this is a two step equation.
The first step would be to find out how many times 20 goes into 140.
140/20=8
So if she makes 5 bracelets for every 20 dollars she makes, and she made 20 dollars 8 time. She would’ve made 5 bracelets, 8 times.
So take 5 bracelets and multiply it by 8.
She needs to make 40 bracelets. :)