The number of marbles each sister gets (x) When m marbles are shared equally among four sisters: x=m/4

Mary used 1/7 of a spool of ribbon to complete 4 projects. she used the same amount of ribbon on each project. how much ribbon did she use on each project?

How many grams the dog will eat in 3 days?

Suppose y varies directly with x. write a direct variation equation that relates x and y. then find the value of y when x=12 y=7 when x=3