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Title: The total weight of Peter, David and Henry is 123 kg, Peter is 15 kg heavier than David. David is 3 Post by: OliviaMilam0807 on Sep 12, 2023 The total weight of Peter, David and Henry is 123 kg, Peter is 15 kg heavier than David. David is 3 kg lighter than Henry. Find Henry's
weight. Title: Re: The total weight of Peter, David and Henry is 123 kg, Peter is 15 kg heavier than David. David ... Post by: bio_man on Sep 12, 2023 Does this help?
(https://biology-forums.com/gallery/47/6_12_09_23_8_09_10.jpeg) (https://biology-forums.com/index.php?action=gallery;sa=view&id=47693) Title: Re: The total weight of Peter, David and Henry is 123 kg, Peter is 15 kg heavier than David. David ... Post by: bio_man on Sep 12, 2023 The total weight of Peter, David and Henry is 123 kg, Peter is 15 kg heavier than David. David is 3 kg lighter than Henry. Find Henry's weight.
See variables for each person, P is peter, D is David, and H for Henry. We are told that the sum is 123, so: (1) P + D + H = 123 We are also told that Peter is 15 Kg more than David: (2) P = 15 + D And that David is 3 kg light than Henry, so: (3) D = H - 3 Substitute these mini equations into equation (1). But first, rearrange equation (3) so that it is in terms of D. P + D + H = 123 (15 + D) + D + (D+3) = 123 18 + 3D = 123 123 - 18 = 3D 105 = 3D D = 35 Sub this into (3) 35 = H - 3 H = 38 kg |