9×(2/3)+9×(1/3)=

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9×(2/3)+9×(1/3)=9×(2/3)+9×(1/3)=9×(2/3)+9×(1/3)=9

9×(2/3)+9×(1/3)=
9×(2/3)+9×(1/3)=

9×(2/3)+9×(1/3)=
9