Question

tìm (x;y) thuộc Z,biết:

\(\frac{x}{y-1}\)=\(\frac{5}{-19}\)

Answer 1

=>  x.(-19)= 5.(y-1)

=> x.(-19)=5.y-5

=> x.(-19)=5.(y-1)

=> x=5; y-1=(-19)

=> y=(-19)+1=-18

Vậy y=-18;x=5

Answer 2

x=5

y=18

Answer 3

=>  x.(-19)= 5.(y-1)

=> x.(-19)=5.y-5

=> x.(-19)=5.(y-1)

=> x=5; y-1=(-19)

=> y=(-19)+1=-18

Vậy y=-18;x=5

Answer 4

=>x.-19=5.(y-1)

=>x=5,y-1=19=>y=-18