there are 4 songwriters
total earning was 104M
let x be the earning of Cara
Jessie = 6M + x
Keynak = 10M + Jessie = 10M + 6M + x
Rhonda received twice of keynak = 2*Keynak = 2*(10M + 6M + x)
since the total was 104
Cara + Jessie + Keynak + Rhonda = 104M
x + 6M + x + 10M + 6M + x + 2*(10M + 6M + x) = 104M
3x + 22M + 20M + 12M + 2x = 104M
5x = 50M
x = 10M = Cara
Jessie = 6M + x = 6M + 10M = 16M
Keynak = 10M + Jessie = 10M + 6M + x = 16M + 10M = 26M
Rhonda = 2*Keynak = 2*(10M + 6M + x) = 32M + 2*10M = 32M + 20M = 52M