Answer:
it's a) 7a/20b
Step-by-step explanation:

Answer:
X=4
Step-by-step explanation:

Answer: X= 16
Step-by-step explanation:
The answer would be 9. 9x3=27 and 9x4=36. Although 3 fits into both, 9 is the BIGGER number that also fits into both of the numbers shown in the problem.