Metoda przeciwnych współczynników.... 7x-3y 5x-y x+y ------ = ----- - ------ 5 3 2 3(x-1)=5(y+1)

(7X-3Y):5=(5X-Y):3-(X+Y):2/×30 3(X-1)=5(Y+1) 6(7x-3y)=10(5x-y)-15(x+y) 3x-5y=8 42x-18y=50x-10y-15x-15y 42x-50x+15x=18y-10y-15y 7x=-7y/:7 x=-y 3×-y-5y=8 -3y-5y=8 -8y=8 y=8:-8 y=-1 x=-y x=1 odp. x=1 y=-1