5x-10+6 (then you sum the like terms)
5x-4
the answer is B 5x-4
6 is d, 7 is b, 8 is c, 9 is c
Angle KMQ and angle RNL are on apposite sides of the transversal and between above and below (exterior to) the parallel lines, so they are alternate exterior angles. Theorem - Alternate exterior angles formed by parallel lines and a transversal have the same measure.