Question

如果关于x的方程a-x分之2ax+3=4分之3的根为x=1,求a的值.

Answer 1

(2ax+3)/(a-x)=3/4

->4(2ax+3)=3(a-x)

->8ax+12=3a-3x

->8ax-3a=-3x-12

->(8x-3)a=-3x-12

将x=1代入上式可得,

(8-3)a=-3*1-12

->5a=-15

->a=-3