Answer:
Step-by-step explanation:
You have 27 quarters (6 dollars and 75 cents) left. You took 36 quarters when shopping.
First you had to add by seven from both sides of equation form.

Then simplify by equation.

Next, you multiply by two from both sides of equation form.

And finally, simplify by equation.





Final answer: 
Hope this helps!
And thank you for posting your question at here on brainly, and have a great day.
-Charlie