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x+3y=-10
-x+2y =-5

2x-3y=7,5
5x+y=-4,1​


Răspuns :

Răspuns:

1/x+3y=-10

-x+2y=-5

/ 5y=-15

y=-15:5

y=3

______________

x+3•3=-10

x+9=-10

x=-10-9

x=-19

2/ 2