Please help me! In Jack's room, there are 144 books in two bookcases. One bookcase has 20 more books than the other. How many books are in each bookcase?

How do i put 3(x+7) in distributive property

Here is my question! jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?