买语文书60本,数学书48本,共花83.4元,已知每本语文书比数学书贵0.22元.求每本语文书的单价
问题描述:
买语文书60本,数学书48本,共花83.4元,已知每本语文书比数学书贵0.22元.求每本语文书的单价
答
[83.4-0.22x60]÷(60+48)+0.22
=0.85元