What inverse operation is needed to isolate the variable in the equation?
k + 1.25 = 12.5
a. add 1.25 to both sides
b. subtract 1.25 from both sides
c. add 12.5 to both sides
d. subtract 12.5 from both sides

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.