题目:at a certain dinner, a hamburger and coleslaw cost $3.59, and a hamburger and french fries cost $4.40, if french fries cost twice as much as coleslaw, how much do french fries cost?
A.$0.30
B.$0.45
C.$0.60
D.$0.75
E.$0.90
答案是E。
我觉得自己是没有理解 french fries cost twice as much as coleslaw这句话,我理解的是F的价钱是C的二倍,于是用H+C=3.59 H+F=4.40 F=2C来列式子计算,但是算出来答案不对。