Question

求值：x+3y分之x-2y,3x-5y=0

Answer 1

3x-5y=0

3x=5y

x/y=5/3

(x-2y)/(x+y)

=(x/y-2y/y)/(x/y+y/y)

=(x/y-2)/(x/y+1)

=(5/3-2)/(5/3+1)

=(-1/3)/(8/3)

=-1/3*3/8

=-1/8