The phrase "me las vas a pagar" translates colloquially to "you will pay me for this" (a threat of revenge), which in this context is likely the who created a series of challenging algebra problems. Mary Rojas might be a fictional name or an alias used by a tutor.
It is important to clarify from the outset that is not a recognized or standard textbook in academic mathematics (Algebra). Instead, a quick search for this phrase in the context of PDFs often points to unofficial, unauthorized compilations of solved exercises , usually shared among students on Latin American platforms (foros, Telegram, o blogs educativos). me las vas a pagar mary rojas pdf %C3%A1lgebra
"Mary is three times as old as Rojas. In 10 years, Mary will be twice as old as Rojas. How old is Mary now?" The phrase "me las vas a pagar" translates