Question

Ted weighs twice as much as Julie. Mike weighs three times as much as Julie. Together, Ted, Mike, and Julie weigh 210 lbs. What is the weight of each person?



Julie weighs pounds, Ted weighs pounds, and Mike weighs pounds.

Answer 1

week 1 they sell X

week 2 they sell X+5

week three they sell 2(X + 5)

X + X + 5 + 2(X + 5) = 431

X + X + 5 + 2X + 10 = 431

4X + 15 = 431

4X = 416

X = 104

so
week 1 = 104
week 2 = 104 + 5 = 109
week three = (double week 2) = 218

and a quick check
218 + 109 + 104 = 431 --------- OK

--------------------------------------...

Julie = X

ted = 2X

mike = 3X

X + 2X + 3X = 210

6X = 210

X = 35

so Julie = 35

ted = 70

mike = 105

quick check
35 + 70 + 105 = 210 --------------- OK

--------------------------------------...

integer 1 = X
integer 2 = X + 1
integer 3 = X + 2
integer 4 = X + 3

X + X + 1 + X + 2 + X + 3 = 114

4X + 6 = 114

4X = 108

X = 27

quick check

27 + 28 + 29 + 30 = 114

Answer 2

I believe the answer is:

Julie weighs 35 pounds
Ted weighs 70 pounds 
and
Mike weighs  105 pounds 

because...

35+70+105=210 lbs.