Dexter has a gift card for $20.00 to an electronics store. He also has a coupon for 25% off his entire purchase, so he will be paying 75% of the total cost. He plans to buy a video game for $10.00 and batteries for $2.00. Select the equation that represents how much money will be left on his gift card after his purchases if x represents his remaining balance.

What is the equation that represents his remaining balance?
x = 20 + 0.75(10 + 2)
x = 20 – 0.75(10 + 2)
x = 20 + 0.25(10 + 2)
x = 20 – 0.25(10 + 2)