bonjour
adultes = x
enfants = x - 6
200 x + 800 ( x - 6 ) = 10 200
200 x + 800 x - 4800 = 10 200
1 000 x = 10 200 + 4 800
1 000 x = 15 000
x = 15
place adulte = 15 €
enfants = 9 €
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bonjour
adultes = x
enfants = x - 6
200 x + 800 ( x - 6 ) = 10 200
200 x + 800 x - 4800 = 10 200
1 000 x = 10 200 + 4 800
1 000 x = 15 000
x = 15
place adulte = 15 €
enfants = 9 €