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.
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.
Anthony is saving money for a gift that costs $52. Given that he already saved $44, write and solve an equation that represents the amount of money he still needs to save.