Create equation problem

Use `eqnproblem`

to create an equation problem.

**Tip**

For the full workflow, see Problem-Based Workflow for Solving Equations.

specifies additional options using one or more name-value pair arguments. For example, you
can specify equations when constructing the problem by using the
`prob`

= eqnproblem(`Name,Value`

)`Equations`

name.