12(1/2-1/3-0,4)-(4y+5-6x)+(2x-6y):1/3=trzeba to krócej zapisać
6-4-4,8-4y+5-6x+2/3x-2y=
2,2-6y-5 1/3x=
6-4-4,8-4y-5+6y+2/3-2y=-7 i 4/5+2/3=117/15+10/15=127/15=(około)8,5
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6-4-4,8-4y+5-6x+2/3x-2y=
2,2-6y-5 1/3x=
6-4-4,8-4y-5+6y+2/3-2y=-7 i 4/5+2/3=117/15+10/15=127/15=(około)8,5