Ответ:
ab=1.6x
bc=1.6x
ac=x p=1.6x+1.6x+x=4.2x
4.2x=21
x=5
ac=5
ab=8
bc=8
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Ответ:
ab=1.6x
bc=1.6x
ac=x p=1.6x+1.6x+x=4.2x
4.2x=21
x=5
ac=5
ab=8
bc=8