Răspuns :

Răspuns:

metoda reducerii

 x - 3y = 5 | -2

2x +  y = 2

-2x + 6y = - 10

2x + y = 2

7y = - 8

y = - 8/7

x - 3(-8/7) = 5

x + 24/7 = 5

7x = 35 - 24

7x = 11

x = 11/7

metoda substitutiei

x - 3y = 5 => x = 3y + 5

2x +  y = 2

2(3y + 5) + y = 2

6y + 10 + y = 2

7y = - 8

y = - 8/7

x - 3(-8/7) = 5

x + 24/7 = 5

7x = 35 - 24

7x = 11

x = 11/7

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