Determine if the linear system 3x1-3x2-2x3=0
−3x3=−7
−x2−3x3=15 is in echelon form
If the system is in echelon form, also identify the leading variables and the free variables in the corresponding answer blanks below. Type x1, x2, and x3 to enter the variables x1, x2, and x3 and separate multiple variables by using a comma. If the system is in echelon form and no such variable exist, type none. If the system is not in echelon form, type NA in both answer blanks.
Leading variable(s):
Free variable(s):