(31б.) Алгебра. Решите системы уравнений:

[tex] 1. \left \{ {{x + 2y= 12} \atop {2x - 3y = -18}} ight. [/tex]

[tex] 2. \left \{ {{6(x + y) = 5 - (2x + y)} \atop {3x - 2y = -3y -3}} ight. [/tex]