Question

A+A=12
B+B=14
C+C=16
A+B+C+D=?

Answer 1

So according to question the value of
A=6
B=7
C=8
D=9

so the sum is 30

Answer 2

➡️A+A=12
➡️B+B=14
➡️C+C=16,
SO....
➡️D+D=18.....( according to A.P.)

⚫NOW....
➡️A+A=12 ,
SO A=6.....
➡️B+B=14,
SO B=7........
➡️C+C=16,
SO C=8.......
➡️D+D=18,
SO D=9.........

⚫NOW......
➡️A+B+C+D = 6+7+8+9
= 30.....

⚫HOPE THIS HELPS........