PLZ ASAP IM IN A TIMED QUIZ What is the solution to the system of equations below?

x + 3 y = 15 and 4 x + 2 y = 30

Which of the following are accepted without proof in a logical system? check all that apply.

George has seven boxes of five pencils. giulio three boxes of eight pencils. one of the boys arranges all his pencils equally into two groups. was this george or giulio how many are in each group explain

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?