Bonjour,
adultes: x
enfants: y
3x +y = 112
y= 112 -3x
2x+2y = 94
2x+2(112 -3x)= 94
2x + 224 -6x = 94
224 -94 = 6x -2x
130 = 4x
x= 130/4 =32,50
3*32,50 +y = 112
97,50 +y = 112
y= 112 - 97,50 = 14,50
adultes: 32,50€
enfants = 14,50€
