3х/10(у+3)-2х/15(у+3)=9х/30(у+3)-4х/30(у+3)=5х/30(у+3)=х/6(у+3)
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3х/10(у+3)-2х/15(у+3)=9х/30(у+3)-4х/30(у+3)=5х/30(у+3)=х/6(у+3)