There are 27 red or blue marbles in the bag the number of red marbles is 5 less than three times the number of blue marbles how many red marbles are in the bag how many blue marbles are in the bag

Answer=24 blue marbles and 3 red marbles

r=red marbles

b=blue marbles

b=3 (r+5)

27=b+r

substitue b for '3 (r+5) '

27=3 (r+5) + r

27=3r+15+r

27=4r+15

subtract 15 from both sides

12=4r

divide both sides by 4

3=r

There are 3 red marbles

27=b+r

27=b+3

subtract 3 from both sides

24=b

There are 24 blue marbles