<span>you have to take arctan(0) to find the value of theta.
tan^-1 (x)=theta </span>
X+12=20 is 8.
x-9=17 and 2x=16 both have the same solution.
The answer should be X+12=20.
Is asking on using two angles and the side joining them, like in the picture below, notice the two blue angles and the red side joining them.
the only thing is that, you have to use angles, and a side, that will be feasible to produce a triangle, meaning, the other two sides will at some point meet and close off the triangle.
-5X-5=25
25+3=28
5X-7=-35
-35+6=-29
25>-29