Question 1014594
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S=smallest; M=middle=S+2; L=largest=S+4
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{{{(S/4)+(M/5)+(L/9)=39}}}
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{{{(S/4)+((S+2)/5)+((S+4)/9)=39}}}
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{{{(S/4)(45/45)+((S+2)/5)(36/36)+((S+4)/9)(20/20)=39}}}
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{{{45S/180+(36(S+2))/180+(20(S+4))/180=39}}}
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{{{45S+(36S+72)+(20S+80)=7020}}}
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{{{101S+152=7020}}}
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{{{101S=6868}}}
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{{{S=68}}}
ANSWER 1: The smallest number is 68.
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{{{M=S+2=68+2=70}}}
ANSWER 2: The middle number is 70.
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L=S+4=68+4=72
ANSWER 3: The largest number is 72.
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CHECK:
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{{{(S/4)+(M/5)+(L/9)=39}}}
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{{{(68/4)+(70/5)+(72/9)=39}}}
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{{{17+14+8=39}}}
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{{{39=39}}}
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