Equations - Part 1

Solve each equation for x. 
  1. 3x + 5 = 10
          -5     -5
    3x        = 5
    /3            /3
    x = 5/3 
  2. 6(x + 4) = 12
    /6               /6
     x + 4 = 2
      -4      -4
    x = -2
  3. 3x - 100 = -100
         + 100   +100
    3x = 0
    x = 0
  4. Compare these solutions:
    5(2x + 6) + 7 = 17
    10x + 30 + 7 = 17
    10x + 37 = 17
           -37     -37
    10x = -20
    /10      /10
    x = -2     		5(2x + 6) + 7 = 17
                    -7     -7
    5(2x + 6)   = 10
    /5                  /5
    2x + 6 = 2
        -6      -6
    2x = -4
    /2     /2
    x = -2
  5. Compare these solutions:
    9 = 3(12x - 7) - 18
    9 = 36x - 21 - 18
    9 = 36x - 39
    +39        +39
    48 = 36x
    /36    /36
    x = 48/36 = 3/2    		 9 = 3(12x - 7) - 18
    +18                 + 18
    27 = 3(12x - 7)
    /3      /3
    9 = 12x - 7
    +7         + 7
    16 = 12x
    /12     /12
    x = 16/12 = 3/2