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6a - x-2
6b - x
6c - x+3
x-2 + x + x+3 = 85
3x = 85 +2-3
3x = 84
x = 28
6a - 28-2 = 26
6b - 28
6c - 28+3 = 31
6b-x
6c-x+3
razem- 85
(x-2)+x+(x+3)=85
x-2+x+x+3=85
3x+1=85 /-1
3x=84 /:3
x=28
6a- 28-2=26
6b- 28
6c- 28+3=31
spr: 26+28+31=85