Joe spends $240 on 4 pairs of shoes. if the cost is at the same rate, how many pairs of shoes will he have if he spends $720?

Either 12 or 60 pairs

1/b^3m^3               i don't know why you couldn't do it yourself its not that hard                     

1) add 6 to 24, write the rest of the equation 10-2x= 30 subtract 10 from 30 2x=20 divide 20 by 2 and x=102) add 3 to -9 write the rest of the equation 4x+3=-6 subtract 3 from -6 4x=-9 x= -2.25  i don't know the rest sorry