math
posted by cole .
a bag has 57 blue and green marbles. there are 13 more blue marbles than green marbles. How many blue and green marbles are in the bag

green marbles  x
blue marbles  57x
57x  x = 13
2x = 44
x = 22
so 22 green and 35 blues
check:
do they add up to 57 ? YES
are there 13 more blue than green ? YES