A group of students are meeting together to study. Four students have to leave early. If 11 of them would remain, write an equation to find how many students are meeting, and then solve it.
Over a week, Madison practiced on her flute for 5 hours. This was 3 hours longer than she practiced the previous week. First write an equation for the number of hours () that she spent practicing the previous week, and then solve it.
David is 14 years older than Matthew. If David is 29 years old, write an equation to determine Matthew’s age, and then solve it.