Question

Tìm x biết

a, \(\dfrac{x-2}{4}=\dfrac{-16}{2-x}\)

b,\(\dfrac{x+y}{2014}=\dfrac{xy}{2015}=\dfrac{x-y}{2016}\)

Answer 1

a, ta co:

x-2/4=-16/2-x

=>(x-2)(2-x)=(-16).4

lai co: x-2/2-x=-1

=>x-2=(-1).(2-x)

Answer 2

a, ta co:

x-2/4=-16/2-x

=>(x-2)(2-x)=(-16).4 (1)

lai co: x-2/2-x=-1

=>x-2=(-1).(2-x) (2)

thay(2) vao(1) ,ta co:

(2-x)^2=-64

.........(tu lam tiep nha)