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y-cena spinki
4x+6y=4,80
x+10y=4,60
4x+6y=4,80
x=4,60-10y
4(4,6-10y)+6y=4,80
18,40-40y+6y=4,80
-34y=-13,6 /:-34
y=0,4
x=4,6-4=0,6
x=0,6
y=0,4
y- il.spinek
4x+6y=4,80
x+10y=4,60/×(-4)
4x+6y=4,80
-4x-40y=-18,40
-34y=-13,60/:(-34)
y=0,4
x+10×0,4=4,60
x+4=4,60
x=4,60-4
x=0,6
y=0,4