Question

entre juan y pedro tienen 20 entre pedro y carlos 40 y entrejuan y carlos 28 entonces si sumamos lo que tiene cada unocuanto

Answer 1

J = juan
P = pedro
C = carlos

J+ P = 20
P + C = 40
J + C = 28

J = 20 - P
C + P = 40
C + J = 28

C + P = 40
C + 20 - P = 28

C + P = 40
C - P = 9

2C = 48
C = 48 / 2
C = 24

24 - P = 8
24 - 8 = P
P = 16

J = 20 -16
J = 4

C = 24
J = 4
P = 16

24 + 4 + 16 = 44