Help me attachment below

Adam drew two same size rectangles and divided them into the same number of equal parts. he shaded 1/3 of one rectangle and 1/4 of the other rectangle. what is the least number of parts into which both rectangles could be divided into?

For the equations below which statement is true ? -2x=14 6x=-42

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?