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6. Rezolvați prin metoda reducerii sistemele: a) 3x+2y=1 4x+3y=3 b) e) (2x+y=-2 4x+5y=8 f) [5x+4y=-4 3x+5y=8 (2x-y=1 [3x+2y=19³ c) g) (2x+3y=-2. 3x+4y=-1 [3x - 5y=18 16x+4y=-6² d) h) [x+y=-1 |5x+2y=7³ [2x+3y=14 |4x-5y=6​