Question

Personal music players are on sale for $39.75. This is $6.50 less than the regular price. Which equation could be used to find the regular price, r?

Thirty-nine dollars and seventy-five cents minus r equals six dollar and fifty cents

Thirty-nine dollars and seventy-five cents plus r equals six dollar and fifty cents

r minus six dollars and fifty cents equals thrity-nine dollars and seventy-five cents

r plus six dollars and fifty cents equals thirty-nine dollars and seventy-five cents