Equation-solving software packages provide scientists, engineers and students considerable power in performing numerical tasks they encounter. The possible uses include plotting functions, solving simultaneous equations, performing numerical differentiation and integration, solving differential equations by iterative methods and etc. Mathcad and Eurica are twin of the equation-solving packages of possible interest. These packages have some overlapping of capabilities, but MathCad has many more features and is more powerful than EURICA. EURICA is more user-friendly and may seem less imposing to the beginners.