Question

the average of three number is 24 if one of the number is 18 and the other number is 29 find the third number

Answer 1

hey..

x + y + z / 3 = 24
x = 18
y = 29
z = ?

18 + 29 + z / 3 = 24
47 + z = 72
z = 72 - 47
z = 25

therefore the third number is 25

Answer 2

x+18+29= 24
x+47= 24
x= 24- 47
x= -23