题目应是若a+b+c/b=17/5,a+b-c/b=12/5,求a/c的值
a+b+c/b=17/5 (1)
a+b-c/b=12/5 (2)
(1)-(2)得
2c/b=1
c=b/2
将c=b/2代入(1)式得
a=19b/10
a/c=(19b/10)/(b/2)
a/c=19/5
题目应是若a+b+c/b=17/5,a+b-c/b=12/5,求a/c的值
a+b+c/b=17/5 (1)
a+b-c/b=12/5 (2)
(1)-(2)得
2c/b=1
c=b/2
将c=b/2代入(1)式得
a=19b/10
a/c=(19b/10)/(b/2)
a/c=19/5