Need help ASAP have a timed quiz and I don't understand the last question

2(n-1)+4n=2(3n-1)n=0no solutioninfinitely many solutions n= - 4 !

Three times the sum of a number and seven is negative thirty-six. what is the number?

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.]