I'm stuck on how to solve these problems

Watch the video and then solve the problem given below. Click here to watch the video. Solve the system of equations. x + y + z =6 2x + 5y + 2z = 3 - x+ 9y - 3z = - 48 Select the correct choice below and, if necessary, fill in the answer boxes to complete y O A. There is one solution. The solution is (Type integers or simplified fractions.) O B. There are infinitely many solutions. The solutions are 2) (Type integers or simplified fractions.) O C. There is no solutionof