Answer:
19.175 or 19 or 20
Explanation:
green marbles: x
yellow marbles: x×5+9
x×5+9+x=57
2x+14=57
2x=4.07
x=2.035
yellow marbles:2.035×5+9
19.175 marbles
(I tried my best sorry)
Step-by-step explanation:8
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