(0.7X+0.6Y)/(X+Y)=0.66(X+Y);【0.7(x-5)+0.6(Y-5)】/(X+Y-10)=0.6625(X+Y)
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(0.7X+0.6Y)/(X+Y)=0.66(X+Y);【0.7(x-5)+0.6(Y-5)】/(X+Y-10)=0.6625(X+Y)(0.7X+0.6Y)/(X+Y)=0.66(X+Y);【0.7
(0.7X+0.6Y)/(X+Y)=0.66(X+Y);【0.7(x-5)+0.6(Y-5)】/(X+Y-10)=0.6625(X+Y)
(0.7X+0.6Y)/(X+Y)=0.66(X+Y);【0.7(x-5)+0.6(Y-5)】/(X+Y-10)=0.6625(X+Y)
(0.7X+0.6Y)/(X+Y)=0.66(X+Y);【0.7(x-5)+0.6(Y-5)】/(X+Y-10)=0.6625(X+Y)
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(0.7X+0.6Y)/(X+Y)=0.66(X+Y);【0.7(x-5)+0.6(Y-5)】/(X+Y-10)=0.6625(X+Y)
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