Use the elimination method to solve the system. x - 3y + 4z = 2x + y + z = - 2x + 3y - 3z = 16 -3 - 13 ... Which of the following methods will eliminate the variable x and reduce the given system to two equations? OA. Subtract the first equation from the second equation. Multiply the first equation by -2 and then add the result to the third equation. B. Multiply the first equation by 2 and then add the result to the second equation. Multiply the first equation by -2 and then add the result to the third equation. OC. Multiply the first equation by -2 and then add the result to the second equation. Multiply the first equation by 2 and then add the result to the third equation. OD. Subtract the first equation from the second equation. Add the second equation to the third equation.