Solve for X Calculator

Solve linear, quadratic, and cubic equations for x with step-by-step solutions

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About This Tool

This advanced online equation solver helps you solve for x in various types of equations including linear equations (ax + b = 0), quadratic equations (ax² + bx + c = 0), and cubic equations (ax³ + bx² + cx + d = 0). Simply enter your equation, select the variable to solve for, choose the solution type, and get detailed step-by-step solutions with explanations. The calculator handles real and complex solutions, shows discriminant calculations for quadratic equations, and provides multiple solution methods.

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How to Use

Enter your equation in the input field (e.g., '2x + 5 = 13' or 'x^2 - 4x + 4 = 0')
Select which variable to solve for (default is 'x')
Choose solution type: 'Exact' for symbolic solutions or 'Numeric' for decimal approximations
Click the 'Solve Equation' button
View the detailed solution with step-by-step explanations in the results section

Frequently Asked Questions

Find Quick Answers

What types of equations can this calculator solve?

This calculator can solve linear equations (first degree), quadratic equations (second degree), and cubic equations (third degree). It supports equations with one variable that you specify.

Does the calculator show step-by-step solutions?

Yes, the calculator provides detailed step-by-step solutions showing how it arrived at the answer, including algebraic manipulations, formula applications, and explanations of each step.

Can it handle equations with multiple variables?

No, this calculator is designed to solve equations with one variable at a time. You need to specify which variable to solve for, and other variables are treated as constants.

What's the difference between 'Exact' and 'Numeric' solutions?

Exact solutions show answers in symbolic form (like fractions, square roots, or complex numbers). Numeric solutions provide decimal approximations rounded to 6 decimal places.

Need to run multiple calculations?

Create a free account today to unlock unlimited daily runs, access advanced parameters, save your history, and request custom features.

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