9n - 7 = 5n - 19
What is n and why did you do that

Which expression shows the sum of the polynomials with like terms grouped together

Select the correct answer from each drop-down menu. a system of equations and its solution are given below. system a complete the sentences to explain what steps were followed to obtain the system of equations below. system b to get system b, the equation in system a was replaced by the sum of that equation and times the equation. the solution to system b the same as the solution to system a.]

Yo need asap pls ! markin da brainiest too !