What is x in this equaction (2x + 21)?

How do i get my dad to stop making me gargle his pickle i want my mom to gargle my pickle not my dads

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

Abouncy ball is released from a certain height. on the first bounce, it travels 32cm. with each subsequent bounce, it travels 9/10 the distance of the previous bounce. what is the total distance that the ball has traveled when it completes its 25th bounce?