Step-by-step explanation: You know that at a rate of 52 miles per hour on a highway. Aunt is 390 miles away. Divide 390 by 52 and you get 7.5. So it will take Ms. Wilson 7.5(7hr 30 min) to see her beloved aunt.
The given value states that all values of x will be replaced by 1. The definition of a variable in algebra is a symbol for a number we don't know yet, so x will be the variable in this equation