Use the expression to answer the question. |-4+x|-12 what is the value of the expression when x=6? a. -10 b. -2 c. 10 d. 2

I’m stuck on this i don’t understand.

Ahigh definition tv cost $800 with a down payment of 2/5 of the cost. how much is left to pay, in dollars after the down payment has been made?

Nine more than four times a number is the same as one less than twice the number. find the number?