10. RT:ST:RS=4:4:7
4+4+7=15 частей
45:15=3 - 1 часть
RT=ST=12
RS=21
13. KS=SN=12:2=6
P1=12+6+MS
P2=6+MS+MN
P1-P2=3
12-MN=3
MN=6
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10. RT:ST:RS=4:4:7
4+4+7=15 частей
45:15=3 - 1 часть
RT=ST=12
RS=21
13. KS=SN=12:2=6
P1=12+6+MS
P2=6+MS+MN
P1-P2=3
12-MN=3
MN=6