Respuesta :

tonb
You start sorting the terms. For instance, the x's go left, and the numbers go right. Remember that if you move something to the other side, the sign flips.

So lets move the x to the left and the +12 to the right:

5x-x = -4-12

Now we simplify

4x = -16

x = -4

done.
jazzy0215
5x + 12 = x - 4
      -12          -12
    5x = x - 16
      -x            -x 
   4x  =  -16
4x   =    -16
___       ___     4x & 4 cancel each other out so you are left with x & -16/4 which 
4               4      equals x= -4
                              

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