Find the reciprocal of 3/5

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Luke started a weight-loss program. the first week, he lost x pounds. the second week, he lost pounds less than times the pounds he lost the first week. the third week, he lost 1 pound more than of the pounds he lost the first week. liam started a weight-loss program when luke did. the first week, he lost 1 pound less than times the pounds luke lost the first week. the second week, he lost 4 pounds less than times the pounds luke lost the first week. the third week, he lost pound more than times the pounds luke lost the first week.

Common binomial factor of 6x(3x+7)+5(3x+7)