How do you find/what is the x value?

X=1 or x=4 because 4 and 1 are the two roots to the equation x²-5x+4=0 and this equation is derived from x²=5x-4 which is derived from x=√5x-4 (so basically you square both sides, then convert to quadratic equation, and finally find the roots for x.)

Answer for 2: his profit would be $2.88 explanation: you have to first multiply 72 and 0.12 together to get $8.64 once you do that you know how much money the shopkeeper made from selling the candy bars individually. so you have to do 8.64-5.76=2.88 hope that ; )answer for 3: yeah i’m sorry i have no idea what number 3 is. i’m sorry i couldn’t with that.