Question

(x-10)/(x-11)+(x-16)/(x-17)=(x-12)/(x-13)+(x-14)/(x-15)

Answer 1

答：

(x-10)/(x-11)+(x-16)/(x-17)=(x-12)/(x-13)+(x-14)/(x-15)

1+1/(x-11)+1+1/(x-17)=1+1/(x-13)+1+1/(x-15)

1/(x-11)+1/(x-17)=1/(x-13)+1/(x-15)

(x-17+x-11)/[(x-11)(x-17)]=(x-15+x-13)/[(x-13...