rezolvati sistemele :

a. {x+3y=7

{x-y=3

b.{x+5y=-3

{x-2y=4

c.{2x+7y=3

{4x-y=-9

d.{4x+y=-1

{-x+3y=23

e.{3x+11y=7

{4x-2y=26

f.{x+6y=10

{4x-3y=13

g.{x+2y=4

{-3x+5y=-1

h.{6x-y=8

{5x-4y=-6
DAU COROANA !!!!!!!!!!!!!!