Question

7x=3y va x-y =16. tìm x; y

Answer 1

ta có : 7x=3y

suy ra  x/3=y/7=k

suy ra x=3k va y=7k ma x-y=16 

suy ra 3k-7k=16

suy ra -4k=16

nen k=-4 suy ra x=-4.3=-12 va y=-4.7=-28

Vay x=-12 va y=-28

Answer 2

\(****nha\)

Answer 3

\(tojyeuvietnamhondatnuocnayiloveyouvacatfboysvaf4\)