Final answer:
The question involves identifying which given equations could be used with a row reduced echelon form calculator, which are typically linear equations in an equal number of variables.
Step-by-step explanation:
The question seems to be about finding the row reduced echelon form of a system of linear equations. Specifically, the question provides a set of equations and asks which one can be used with a row reduced echelon form calculator. Two of the equations (a and b) are linear equations in two variables, and one (c) is a linear equation in a single variable. Option (d) suggests that none of the provided equations are suitable for the calculator. This might be a misunderstanding as equations (a) and (b) could indeed be used with such a calculator to solve a system of equations. However, since equation (c) involves a different variable (z), it cannot be directly combined with the other two unless more information is provided.
Typically, one uses row reduction to solve systems of equations where the number of equations matches the number of variables. In this case, you would need another equation involving x, y, and z to use row reduction effectively for all three equations together.