The two angles shown form a linear pair. What is the value of x?
Horizontal line divided by a diagonal line. The angle formed on the left by the two lines is labeled 10 x minus 20 degrees. The angle formed on the right by the two lines is labeled 6 x plus 8 degrees.
A straight line is 180. Adjacent angles in that line equal 180. Add 10x-20 and 6x+8, which equals 16x-12. Make 16x-12 equal to 180 and add 12. 16x=192, divide both sides by 16 and x=12
