Question 548526
<pre>
2x + 7 = 15 
   - 7   -7
-----------
2x     =  8
{{{2x/2}}} = {{{8/2}}}
      x = 4
     


{{{x/3}}} - 5 = -1
3·{{{(x/3)}}} - 3·(5) = 3·(-1)
 x - 15 = -3
    +15  +15
------------
 x      = 12    
 


30 = 16 + {{{1/5}}}x 
5·(30) = 5·(16) + 5·{{{1/5}}}x
150 = 80 + x
-80  -80
------------
 70 =      x



7 + {{{2/3}}}x = -1
3·(7) + 3·(2/3)x = 3·(-1)
 21 + 2x =  -3
-21        -21
--------------
      2x = -24
     {{{2x/2}}} = {{{(-24)/2}}}
       x = -12
 


22 = 18 - {{{1/4}}}x
4·(22) = 4·(18) - 4·{{{1/4}}}x
 88 = 72 - x
-72  -72
------------
 16 =     -x
 16 = -1x
{{{16/(-1)}}} = {{{(-1x)/(-1)}}}
-16 = x 
 


 -7x + 4x = 9 
      -3x = 9
      {{{(-3x)/(-3)}}} = {{{9/(-3)}}}
        x = -3



3x - 7 + x =  5 
    4x - 7 =  5
        +7 = +7
----------------
    4x     = 12 
    {{{(4x)/4}}} = {{{12/4}}}
         x = 3



12(2 - x) =   6
 24 - 12x =   6
-24         -24 
---------------
     -12x = -18
     {{{(-12x)/(-12)}}} = {{{(-18)/(-12)}}}
        x = {{{18/12}}}
        x = {{{3/2}}}
       


{{{-4/9}}}(2x - 4) = 48 

9·{{{(-4/9)}}}(2x - 4) = 9·(48)
-4(2x - 4) = 432
  -8x + 16 = 432
       -16   -16
----------------
  -8x      = 416
       {{{(-8x)/(-8)}}} = {{{416/(-8)}}}
         x = -52 
 


{{{4x/3}}} + 3 = 23
3·{{{((4x)/3)}}} + 3·3 = 3·23
        4x + 9 = 69
           - 9   -9
       -------------
        4x     = 60
          {{{(4x)/4}}} = {{{60/4}}}
             x = 15 
              


 
    -10 = {{{1/2}}}x + x
2·(-10) = 2·({{{1/2}}}x) + 2·x
    -20 = 1·x + 2·x
    -20 = 3x
    {{{(-20)/3}}} = {{{3x/3}}}
     {{{-20/3}}} = x 
 
 


55x - 3(9x + 12) = -64 
  55x - 27x - 36 = -64 
        28x - 36 = -64
            + 36 = +36
       ---------------
        28x      = -28
            {{{(28x)/28}}} = {{{(-28)/28}}}
               x = -1



9x - 5(3x - 12) = 30
  9x - 15x + 60 = 30
       -6x + 60 =  30
            -60 = -60
       --------------
       -6x      = -30
            {{{(-6x)/(-6)}}} = {{{(-30)/(-6)}}}
              x = 5

Edwin</pre>