There are 39 marbles in the bag. if there are 7 more green marbles than than blue. what would be the number of green an blue marbles in the bag?

Step-by-step explanation:

We set up the problem like this: 39 = x + (x + 7)

x = blue marbles

39 = 2x + 7

Subtract 7 from each side

32 = 2x

Divide each side by 2

16 = x

39 = 16 + (16 + 7)

Blue marbles = 16

Green marbles = 16 + 7 = 23

There are 23 green marbles and 16 blue marbles.