2x - 12 = 6
2x = 6 + 12
2x = 18|: 2
x = 9
-8x + 10 = 4
-8x = 4 - 10
-8x = -6|: (-8)
x = [tex]\frac{6}{8}[/tex]
x = [tex]\frac{3}{4}[/tex]
9 - x = 21
-x = 21 - 9
-x = 12|* (-1)
x = -12
[tex]\frac{1}{3}[/tex]x - 4 = 5
[tex]\frac{1}{3}[/tex]x = 5 + 4
[tex]\frac{1}{3}[/tex]x = 9|* 3
x = 27
