Answer:
297
Explanation:
let's call what Peter gets "x" ,since Alex gets three times as much as Peter we can call it 3x and Gavin 6x because he got 2 times more than Alex
adding all of them together is £990 so
6x + 3x + x = £990
10x = £990
x = £99
Alex got 3x therefore the answer is 3 × 99 = 297