Eight less than a number is seventy-five. What is the number?

A - 8 = 75

a = 75 + 8

a = 83

Let x be the unknown number. With the representation, eight less of this number is equal to x - 8. This is equal to 75. Thus, the equation is,

x - 8 = 75

The value of x is equal to 83. Thus, the unknown number is 83.