Sin^-1(5/13) = 22.6
sin(22.6/2) = 0.196
(2/3x + 2 - 1/6x + 4) • 1/5 ÷ 1/5
(1/2x + 6) • 1
1/2x + 6
bearing in mind that parallel lines have the same exact slope, then any parallel line to the one above will have the same slope as that one.

3 times 3 times 2 equals 18