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Solve {x*(p*0.3125-r*0.625)+r*0.625-0.0641666666666667=0; q*(r*(0.625-p*0.3125)-0.625)+p*0.275-r*0.65+0.476666666666667 = 0; 0<x<1; 0<q<1; 0<p<1; 0<r<1}
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