Algebra Calculator

What is the Algebra Calculator?

The algebra calculator solves for an unknown variable in an equation. Type in something like 3x + 5 = 20 and it tells you x = 5, along with the steps used to get there. Students use it to check their work and understand where they went wrong. It handles linear equations, simple quadratics, and expressions with one variable — making it practical for most algebra coursework from pre-algebra through high school.

How Does It Work?

Solving a linear equation means isolating the variable on one side. You do this by applying inverse operations: if something is added, you subtract it from both sides; if something is multiplied, you divide both sides. The key rule is that whatever you do to one side, you do to the other — the equation stays balanced.

For a linear equation ax + b = c: x = (c − b) / a

• x = the unknown variable

• a = coefficient of x

• b = constant added or subtracted from the x term

• c = the value on the right side of the equation

How to Use CalciHub's Algebra Calculator

1. Type your equation into the input field using standard notation (e.g., 2x + 4 = 10).

2. Use * for multiplication if your equation involves it (e.g., 3*x).

3. Click Solve — the calculator returns the value of x.

4. Below the answer, you'll see each step explained.

Tip: If your equation has variables on both sides, that's fine — just type it as written and the calculator handles the rearranging.

A Quick Example

Equation: 4x − 7 = 13. Step 1: Add 7 to both sides → 4x = 20. Step 2: Divide both sides by 4 → x = 5. Enter this into CalciHub's algebra calculator and it walks through exactly these two steps. Now try something slightly harder: 2(x + 3) = 14. Expand: 2x + 6 = 14. Subtract 6: 2x = 8. Divide by 2: x = 4. The calculator handles the expansion automatically.

Seeing the steps laid out makes it easier to spot where your own working went off track — the calculator is as useful for learning as it is for getting the answer.

Frequently Asked Questions