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Solve linear equations (ax + b = c), quadratics (via the quadratic formula), and pairs of simultaneous equations — each with the working shown step by step.
Linear equations, quadratics, and 2×2 systems with working shown.
Linear: x = (c − b)/a · Quadratic: x = (−b ± √D)/2a · System: Cramer's determinants
| Symbol | Meaning |
|---|---|
| a, b, c | Coefficients of the equation |
| x, y | Unknowns being solved for |
2x + 3 = 11 → x = 4. System x + y = 5, x − y = 1 → x = 3, y = 2.
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Linear ax+b=c, quadratic ax²+bx+c=0, and 2×2 linear systems. Single absolute-value equations have their own calculator.
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Content updated: September 2026