Kilograms 7343

Max and Katy weigh 75 kg together, Katy and Tina weigh 71 kilograms, and Max and Tina weigh 80 kilograms. Thus, each of the children weighs 75 kilograms.

Correct answer:

k =  33
m =  42
t =  38

Step-by-step explanation:


m+k=75
k+t=71
m+t=80

k+m = 75
k+t = 71
m+t = 80

Row 2 - Row 1 → Row 2
k+m = 75
-m+t = -4
m+t = 80

Row 3 + Row 2 → Row 3
k+m = 75
-m+t = -4
2t = 76


t = 76/2 = 38
m = -4-t/-1 = -4-38/-1 = 42
k = 75-m = 75-42 = 33

k = 33
m = 42
t = 38

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