Below is an instruction that describes a task. Write a response that appropriately completes the request in French. Please answer in French.

### Instruction:
 Amanda needs 12 more marbles to have twice as many marbles as Katrina, and Mabel has 5 times as many marbles as Katrina. If Mabel has 85 marbles, how many more marbles does Mabel have than Amanda?


### Response:
 Katrina a 85/5 = <<85/5=17>>17 billes.
Deux fois plus de billes que Katrina, c'est 17 x 2 = <<17*2=34>>34
Amanda a besoin de 12 billes de plus pour avoir deux fois plus de billes que Katrina, donc Amanda a 34 -12 = <<34-12=22>>22 billes.
Mabel a 85 - 22 = <<85-22=63>>63 billes de plus que Amanda.