题目

A train ride from Birdville to Baytown costs $6.95 more than does a bus ride from Birdville to Baytown. Together, the cost of one train ride and one bus ride is $9.45. What is the cost of a bus ride from Birdville to Baytown?


选项

A.

$1.25

B.

$2.50

C.

$4.10

D.

$4.70

E.

$8.20

解析

正确答案:A 解析:设火车票价为\( t \),公交车票价为\( b \),可得以下方程:\( t = b + 6.95 \),且\( t + b = 9.45 \)。将第一个方程中的\( t \)替换为\( (b + 6.95) \),代入第二个方程可得:\( b + 6.95 + b = 9.45 \)。化简后得到\( 2b + 6.95 = 9.45 \),即\( 2b = 2.50 \),因此\( b = 1.25 \)。由于题目问的是公交车票价,所以正确答案是A。
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