The first option is correct.
You could do all the math to compare the final answers, but I looked at the part where you add. Using a standard algorithm, when going on to the next digit in the second number, you always add a 0 first. The rest of those options don't include a 0.
Answer:
The answer is 6x+24
Step-by-step explanation:
425 dollars is 500 with a 15% discount
