if 4,a,b,28 are in arithmetic progression then the value of b is
Answers
Answered by
9
Answer:
2a=4+b
2b=a+28
multiple with 2
4b=2a+56
subs 2a value from 1st line
4b=4+b+56
3b=60
b=20.
Answered by
5
Answer:
20
Step-by-step explanation:
a-4= b-a -(1)
a-4 = 28-b - (2)
from 1 & 2
a =12,b=20
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