Whats 9 plus 10 what 9 +10

Twenty-five percent of the customers entering a grocery store between 5 p. m. and 7 p. m. use an express checkout. consider five randomly selected customers, and let x denote the number among the five who use the express checkout.

For what value of x does 4x = (1/8) x + 5?

Write two subtraction equations that are equivalent to 5 + 12 = 17.