(1)x小时=60x分钟,
(A)计时制:(0.05+0.02)•60x=0.07•60x=4.2x,
(B)包月制:60+0.02•60x=60+1.2x.
(2)4.2x=60+1.2x
x=20
(3)由(2)得知,两种收费方式的费用一样.所以小明可以任选一种.
(1)x小时=60x分钟,
(A)计时制:(0.05+0.02)•60x=0.07•60x=4.2x,
(B)包月制:60+0.02•60x=60+1.2x.
(2)4.2x=60+1.2x
x=20
(3)由(2)得知,两种收费方式的费用一样.所以小明可以任选一种.