Question

va rog mult ,am nevoie urgent ​

Answer 1

Răspuns:

a) 2x+y=10/2

x-2y=-5

4x+2y=20

x-2y=-5

5x= 15. x=3

y=10-2x=10-6=4. y=4

b) x+y= 7/-2

x+2y=10

-2x-2y=-14

x+2y=10

-x=-4. x=4

y=7-4=3. y=3