Question

How do you solve 5x + 6 = 2x + 15

Answer 1

   5x + 6 = 2x + 15
-2x                       -2x

= 3x + 6 = 15
-15              -15

=3x -9

=3x         -9
  ----   =   ----
   3            3

= -3

Answer 2

Ok.  5x+6=2x+15

the first think we have to do is combine like terms.  we need to put all the x on one side and all the regular numbers on the other side.
5x+6=2x+15
     -6       -6
5x=2x+9
-2x -2x
3x=9

the next thing we have to do is isolate the x from the regualar numbers. since divition is the opposite of multiplication we divide to undo the division

3x=9
--  ---
3   3
x=3