Hallar M X M y el rango de la relacion

R = ( ( x , y ) E M x M / x + y = 4

What is the value of x in the equation 2(x-4) = 4(2x + 1)?

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

Divide. write in simplest form 41/6 divided by 10