Answer :
Marcia= x
Peter= 2x
Cyndy=x+17
x+2x+x+17
4x+17
17/4=4.25
x= 4.25
Marcia= 4.25
Peter= 8.5
Cyndy= 21.25
Peter= 2x
Cyndy=x+17
x+2x+x+17
4x+17
17/4=4.25
x= 4.25
Marcia= 4.25
Peter= 8.5
Cyndy= 21.25