Justin weighs 15 pounds less than Greg weighs. half of Greg’s weight is 75 pounds less than Justin‘s weight. how much does each of them weigh?

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

What are “like terms”? why can we only add like terms?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?