bonjour,

balle  =  x

ballon  = x + 1

raquette  = 2 x

6 x + 2 ( x + 1 )  + 2  ( 2 x ) = 98

6 x + 2 x + 2 + 4 x = 98

12 x = 98 - 2

12 x = 96

x =  8

balle  = 8 €

ballon  = 9 €

raquette = 16 €