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

### Instruction:
In a Math competition, Sammy scored 20 points, Gab scored twice as many as Sammy's score, while Cher scored twice as many as Gab's score. If their opponent scored 85 points, how many more points do they have than their opponent?

### Response:
 Gab alipata alama 20 x 2 = <<20*2=40>>40.
Cher alipata alama 40 x 2 = <<40*2=80>>80.
Timu yao ilipata alama 20 + 40 + 80 = <<20+40+80=140>>140.
Hivyo, waliipata alama 140 - 85 = 55 zaidi ya wapinzani wao.