Use the calculator to check textbook exercises, classroom examples, and quick tutoring demos. Share links preserve the selected mode and coefficients so students and colleagues can revisit the same inequality setup.
Results
Number line
Plane view
Teacher notes
FAQ
Can I share the exact configuration with students?
Yes. Use the Copy URL button to generate a shareable link that stores the active mode, coefficients, and teacher notes toggle. Anyone opening the link sees the same inequality and solution steps.
What happens if I leave coefficients blank?
Empty fields default to zero only in the system mode, where unused rows are ignored. In every other mode, empty or invalid numbers trigger an inline warning so you can correct the input before running the solver.
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