Step-by-step explanation:
2) 
Multiply 8 on both sides to isolate w

3) 
Add 2 on both sides to isolate f

4) 
Multiply 12 on both sides to isolate y

5) 
Subtract 6 from both sides to isolate r

6) 
Subtract 7 from both sides to isolate x

7) 
Subtract 1 from both sides to isolate n

8) 
Divide both sides by 9 to isolate x

9) 
Subtract both sides by 3 to isolate p

10) 
Multiply both sides by 3 to isolate c

11) 
Add 13 to both sides to isolate k

12) 
Divide both sides by 5 to isolate x
