15-a/3= -9

Question

15-a/3 =-9

Answer 1

It looks like (without parenthesis):

        a

15  - --- = -9

        3

 

multiply both sides by 3

 

45 - a = -27

subtract 45 from both sides

 

-a = -72

 

divide each side by -1

 

a = 72

Answer 2

Dear C., you have to use parentheses to avoid double reading!!!!


(15 - a) / 3 = - 9

  15 - a 
---------- = - 9
     3 

15 - a = - 27

- a = - 27 - 15

- a = - 42

  a = 42

Answer 3

15 - a/3 = -9

 

multiply by -3 to get:

 

-45 + a = 27, then just add 45 to both sides to get:

 

a = 72

 

Your Answer is, a = 72