Answer:
x=21
Step-by-step explanation:
2x - 7 = 35
+7 +7
-----------------
2x = 42
----- -----
2 2
x = 21
The answer is 21, hope this helps.
Number of boards already present = 10
Number of boards purchased = 35
Number of boards received for customer loyalty = 2
Total number of boards are = 
Hence now total boards are 47 after purchasing and receiving as loyalty gift.
What are the other selections? I think it is right though, just making sure.
Exactly halfway between 2 given points.