Răspuns:
2(3x + 2y) + 2(- x - 4y) = - 12
12(5x + y) - 4y = - 14
6x + 4y - 2x - 8y = - 12
60x + 12y - 4y = - 14
4x - 4y = - 12 | : 4
60x + 8y = - 14 | : 2
x - y = - 3
30x + 4y = - 7
x = y - 3
inlocuim x
30(y - 3) + 4y = - 7
30y - 90 + 4y = - 7
34y = 90 - 7
34y = 83
y = 83/34
inlocuim y
x = 83/34 - ³⁴⁾3
x = (83 - 102)/34
x = - 19/34
[tex]solutii~x=-\frac{19}{34}~~y=\frac{83}{34}[/tex]
