* questions 18-19, determine which equation
Mark borrowed $125 from his Dad to pay some
bills. If he has already paid back $30, how
much does he still owe? (let a = amount owed)
Mark borrowed> (Subtracting) 125 dollars, so he will have negative 125 because he took it away. He gives back> (Addition) 30 dollars. -125+30= -95. So, he owes 95 dollars.
