How are possibilities observed in a game of poker?

Me what is the value of x? showing work would be appreciated - ! : )

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

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions. a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0