买语文书30本,数学书24本,共用去41.7元,已知每本语文书比数学书贵0.22元,语文书每本多少元?数学书每本多少元?
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设数学书每本x元,则语文书为(x+0.22)元24x+(x+0.22)×30=41.724x+30x+6.6=41.7 54x=41....