# Equation Steps

Solves linear and quadratic equations in one variable (x) and shows every intermediate step: expanding parentheses, combining like terms, moving terms across the equals sign, and applying the quadratic formula. Built so the sign flips and the ± are always right, which is exactly where hand-worked algebra and casual model answers go wrong.

**Not for:** Not for systems of equations, equations with more than one variable, inequalities, equations involving division by the variable, roots/trig/log of the variable, or anything of degree higher than 2 once expanded. Not a substitute for a full CAS — it covers exactly the linear and quadratic case in one variable and refuses everything else by name rather than guessing at it.

## Surfaces

- HTML: `https://equation-steps.gumballtools.com`
- Markdown: same URLs with `Accept: text/markdown` or `?format=md`
- JSON API: `https://equation-steps.gumballtools.com/api/v1/run`
- OpenAPI: `https://equation-steps.gumballtools.com/.well-known/openapi.json`
- MCP: `https://equation-steps.gumballtools.com/api/mcp`