Given that x = 1 is the solution of the equation mx-n-4x = 3 about X, what is the value of m-n. if the root of the equation 9x-a = 0 about X is A-1, what is the value of A-1 / a Help. I'm in a hurry

Given that x = 1 is the solution of the equation mx-n-4x = 3 about X, what is the value of m-n. if the root of the equation 9x-a = 0 about X is A-1, what is the value of A-1 / a Help. I'm in a hurry

m-n=7
a-1/a=1/9