Question 12526
1) 99=3a 
  99=3a
 (99)/(3)=(3a)/(3)  First,Divide 3 to both sides
  33=a 
  a=33 Thats The Answer

2) 6.5b=3 
   6.5b=3
   (6.5b)/(6.5)=(3)/(6.5) First,Divide 6.5 to both sides
   b=.46 The answer

3) c/6=12
   c/6=12       First,Multiply 6 to both ides to get the answer
  6*(c)/(6)=12*6
   c=72         The answer
4) 4=d/12 
   4=d/12          The same as No.3.Multiply First, 12 to both sides
   12*4=(d)/(12)* 12
   48=d
   d=48 The answer

5) c/0.3=150  
   c/0.3=150          The Same Also as No.3 and No.4.
   .3*(c)/(0.3)=150*.3
   c=5 The Answer

The Following 6-10 .I will answer it Nexttime.