Answer: The missing number in the sequence is 
Step-by-step explanation:
Since we have given that

First term = a= 
Common difference = d is given by

Therefore, it forms an arithmetic sequence.
Since,
is missing,
So,

Hence, the missing number in the sequence is 
A = B
6.9 => 7 8.3 => 8
8+7=15
6.2 => 6 8.5 => 9
6+9=15
so A = B
Answer:
y = 9 + 4x/3
x = -27/4 + 3y/4
*everything that looks like x/y is a fraction, -27/4 is entirely negative