What does the letter x stand for in 2x+5

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out