If 4 x is 9 greater than the sum of x and 3 y, then x is how much greater than y?
A.3
B.6
C.9
D.12
E.15
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If 4 x is 9 greater than the sum of x and 3 y, then x is how much greater than y?
A.3
B.6
C.9
D.12
E.15