For the first one it might be 26? i’m not so sure
The answer is C.
This is because 7 must be greater than 12-g.
G cannot equal 5 and below because 12-5=7.
Therefore C is the only answer that works.
Expand the right side:


Notice that 98 = 2 * 7 * 7, so we have
and
.
Then

and

C is the answer ! Hope I’m correct