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b)2d+d+4d+(2d-6)=2d+d+4d+2d-6=9d-6
a)s+2s+25+2s-20=5s+5
b)2d+d+4d+(2d-6)=9d-6
myślę że dobrze :))
5s+5
b)2d+d+4d+(2d-6) =
2d+d+4d+2d-6=
9d-6