Respuesta :
let Julie's weight be x
ted's weight = 2x
mike's weight = 3x
..
all three weigh 210lbs
..
x+2x+3x=210
6x=210
divide by 6
x=210/6
x=35
julie's weight = 35 lbs.
Ted's weight = 2x
= 2*35=70 lbs
Mike's weight = 3x
= 3*35=105 lbs
CHECK
35+70+105=210 lbs
ted's weight = 2x
mike's weight = 3x
..
all three weigh 210lbs
..
x+2x+3x=210
6x=210
divide by 6
x=210/6
x=35
julie's weight = 35 lbs.
Ted's weight = 2x
= 2*35=70 lbs
Mike's weight = 3x
= 3*35=105 lbs
CHECK
35+70+105=210 lbs