Hi there!

First we need to work out the parenthesis, which can for instance be done using rainbow technique.

Now subtract 3 from both sides.

And finally add 3x to both sides.

The 4th answer choice is correct.
Decimal form: 4.05, 0.5
Exact form: 9/2, 1/2
Answer:
Bill received 13.68 change back.
Step-by-step explanation:
20-6.32=13.68
3.70+1.25+1.48= 6.43.
20-6.43=13.57
You would get $13.57