Oblicz metodą przeciwnych współczynników3x-4y=156x-19y=
3x-4y=15/-26x-19y=
-6x+8y=-30
6x-19y=2 1/4
---------------
-11y=-27 3/4/:-11
y=111/11
y=10 1/11
3x-4*111/11=15
3x-444/11=15
3x=165/11+444/11
3x=609/11/:3
x=609/11*1/3
x=203/11
x=18 2/11
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3x-4y=15/-2
6x-19y=
-6x+8y=-30
6x-19y=2 1/4
---------------
-11y=-27 3/4/:-11
y=111/11
y=10 1/11
3x-4*111/11=15
3x-444/11=15
3x=165/11+444/11
3x=609/11/:3
x=609/11*1/3
x=203/11
x=18 2/11