8 - 5x3, for x = -1

The 3 after the x is a exponent plz help

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.

The only number less than 8 that can equal 12 would be 6, 36 is the dividend