What is the value of k in the equation 4/9(k+4/7)=3 1/3 ?

Me write an equation for the interior angles of this triangle that uses the triangle sum theorem

What are “like terms”? why can we only add like terms?

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.