Solve for x in the equation x + 10 = 15. a. x = −5 b. x = 25 c. x = 10 d. x = 5

D.  5 + 10 = 15

It's just an easy question, not trying to rude 

D=5 
because A,B,and C wouldn't work therefore:
5+10=15

First you need to divide:
   6÷4=1.5     
  Then if we want the answer as a fraction, we just do 1 5/10 (because it is 1 and 5 tenths in decimal form).     But we can simplify our answer and it can also be equal to  1 1/2 (since 5 is half of 10). 
 

I hope this helped :)