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6/10 = DE/8
3/5 = DE/8
DE = 24/5
DE = 4,8
2. BD/BA = DE/AC
10/10+AD = 6/9
10/10+AD = 2/3
20 + 2 AD = 30
2 AD = 10
AD = 5
3. AD/AB = DE/BC
AD / AD+4 = 6/9
AD /AD+4 = 2/3
3 AD = 2AD +8
AD = 8
AB = AD+BD
AB = 8 + 4 = 12
4. MP/ML = OP/KL
OP = KL . MP / ML
PL/LM = KL/OP
PL = KL. LM / OP