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x+5y=-9.5
6x-3y=9
x = -9,5 -5y
6*(-9,5 -5y) -3y=9
-57-30y-3y=9 /+57
-33y = 66 /:-33
y = -2
podstawiamy wynika do x+5y=-9.5
x+5*(-2) = -9,5
x-10 = -9,5
x = 0,5
spr
6x-3y=9
6 * 0,5 -3 * (-2) = 3+6 = 9
x+5y=-9.5 /x(-6)
6x-3y=9
-6x-30y=57
dodajemy
-33y=66
y=-2
x-10y=-9.5
x=0.5
odp
x=0.5
y=-2
x+5y=-9.5/-5y
6x-3y=9
x=-9.5-5y
6(-9.5-5y)-3y=9
x=-9.5-5y
-54-30y-3y=9
x=-9.5-5y
-54-33y=9/+54
x=-9.5-5y
-33y=63/:(-33)
x=-9.5-5y
y=-1.9
x=-9.5-5(-1.9)
y=-1.9
x=-9.5+10.45
y=-1.9
x=0.95