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-4x+3y=-1 / *4
9x-12y= -3
+ -16x+12y=-4
---------------------------
-7x=-7 / : (-7)
x=1
3x-4y=-1
3-4y=-1
-4y=-4 / : (-4)
y=1
x=1
y=1
Odpowiedź D(1,1)
-4x + 3y = -1/*3
12x - 16y =-4
-12x +9y =-3
12x -16y + (-12x) + 9y =-4 + (-3)
12x - 16y - 12x+ 9y = -4 - 3
-7y=-7 /:(-7)
y = 1
3x - 4*1 = -1
3x - 4 = -1 /+ 4
3x = 3 /:3
x = 1
Odp. D