Isaac has 21 green marbles and seven blue ones if you wants to place them in identical groups without any marbles left over what is the greatest number of groups as that can make

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation: