Check the picture below.
now, if those two angles are corresponding, that means they're equal, therefore then
5x + 15 = 115
and surely you know what "x" is, and for that value, the angles are corresponding and therefore the lines are parallel.
now, if those two angles are corresponding, that means they're equal, therefore then
5x + 15 = 115
and surely you know what "x" is, and for that value, the angles are corresponding and therefore the lines are parallel.