Question

If 20 ,x+1, 4 are in Ap. then value of
x is
​

Answer 1

Answer:

thank you for free points

Answer 2

Answer:

11

Step-by-step explanation:

x + 1 - 20 = 4 - ( x + 1 )

x - 19 = 4 - x - 1

x - 19 = 3 - x

x + x = 3 + 19

2x = 22

x = 22 / 2

x = 11

( or )

2 ( x + 1 ) = 4 + 20

2 ( x + 1 ) = 24

x + 1 = 24 / 2

x + 1 = 12

x = 12 - 1

x = 11

( or )

x + 1 = ( 4 + 20 ) / 2

x + 1 = 24 / 2

x + 1 = 12

x = 12 - 1

x = 11

( For this kind of sum, 3 different methods can be used to find the answer and I have used the 3 different methods to find the answer. This may help you in finding the answers easily. )