18 oz size cheerios box 3.64 for 18 ounces =$ ounce pls

Find the solution of this system of equation -7x+y=-20 9x-3y=36

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?

With both problems. a.s.a.p directions on photo ^