Answer:
-4
Step-by-step explanation:
Given : There are 4 numbers .
The sum of three numbers is 22
The sum of 4 numbers is 8.
To Find : The fourth number.
Solution :
Let first no. be w
Let second no. be x
Let third no. be y
Let fourth no. be z
Since we are given that The sum of 4 numbers is 8.
⇒w+x+y+z=8 ---(a)
We are also given that the sum of three numbers is 22
⇒w+x+y=22
Now put this value in a
⇒w+x+y+z=8
⇒22+z=8
⇒z = 8-22
⇒z = -14
Hence , The fourth number z is -4
