The evaluation type solve equation can be used to check if the student’s answer is a correct solution to the equation in the Definition field. The evaluation type solve inequality does the same for inequalities. Both are limited to equations of first or second degree in one variable.

These evaluation types don’t have automated feedback themselves, but instead, the evaluation type fb solve (in)eq can be used to give automated negative feedback on the student’s answer.

**Evaluation types: solve equation and solve inequality**

Examples:

When either of those evaluation types is used in a Solution rule, the evaluation type fb solve (in)eq can be used in negative feedback to give automated feedback on the student’s answer.

**Evaluation type: fb solve (in)eq**

When the evaluation type solve inequality or solve equation is used in a solution role, this evaluation type can be used in the negative feedback to give automated feedback on the student’s answer. There are three options for the definition field, which are explained below. For the demonstration of these feedback rules, Solution 1 in the image above is used.

`0 (none)`

: The answer domain is neither in nor around the solution domain

`2 (inside)`

: The answer is in the solution domain, but it does not contain it. It is too small.

`3 (contains)`

: The answer contains the solution domain but is not contained in it. It is too big.

**More on evaluation types**

An overview of all evaluation types can be found here (for mathematical answers) and here (for text-based answers). More detail on the different fields of a feedback rule can be found here.