Can anyone me which fractions represent the given fractions rewritten with their lcd 4/3x-6y, 1/5x-10y

Find the value of the variable and the length of each secant segment.

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?

Acar travels at an average speed of 56 miles per hour. how long does it take to travel 196 miles