育才小学买语文书30本,数学书28本,共花290.4元,每本语文书比每本数学书贵0.4元语文书的价钱是元,数学书的价钱是元.
2019-04-30
育才小学买语文书30本,数学书28本,共花290.4元,每本语文书比每本数学书贵0.4元语文书的价钱是______元,数学书的价钱是______元.
优质解答
设数学课本每本x元,则语文课本每本(x+0.4)元,则:
28x+(x+0.4)×30=290.4
28x+30x+12=290.4
58x=278.4
x=4.8
语文:4.8+0.4=5.2(元)
答:数学书的价钱是4.8元,语文书的价钱是5.2元.
故答案为:5.2,4.8.
设数学课本每本x元,则语文课本每本(x+0.4)元,则:
28x+(x+0.4)×30=290.4
28x+30x+12=290.4
58x=278.4
x=4.8
语文:4.8+0.4=5.2(元)
答:数学书的价钱是4.8元,语文书的价钱是5.2元.
故答案为:5.2,4.8.