Hallo ,
Personen : K ; T ; D ;M
K+T+D+M = 187
K = 1,2 T T = K / 1,2 T = 7M / 12
D = M-10
K : M = 10:7 K = 7*M / 10 oben einsetzen
\( \frac{7M}{10} \) +\( \frac{7M}{12} \) + M-10 +M = 187 | 10
3,28 M = 197
M = 60,06 K = 42,04 T = 35,06 D = 50,06
gerundet 60 + 42 +35 +50 = 187