Answer: x = 30º
Explanation:
Straight angles are always 180º. We are told MKL is 150º, so JKM must be 180 when added to 150.
To view it in a more "algebraic way," this can be represented as 150 + x = 180. To isolate the variable (x), subtract 150 from both sides. 150 - 150 = 0, so that cancels out, and 180 - 150 is 30. So, we are left with x = 30, and the equation is solved.
In a more simple and faster way, to find JKM, subtract 180-150. 180 - 150 = 30, therefore JKM is 30º