Power Calculators

＝ Linear Equation Solver

Solve a linear equation of the form ax + b = c for x.

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Enter details

Fill in the details and click Calculate to see your results.


Also available in our Android app, with charts and full breakdown tables.

📘 About the Linear Equation

Solve one-variable linear equations using numeric coefficients.

🧮 Formula

Where

  • a = coefficient of x
  • b = constant term
  • c = right-hand side
x = (c - b) / a.

✏️ Worked example

2x + 3 = 11

You enter
Coefficient a2
Constant b3
Right side c11
You get
x4

The solution is 4.

Try this example →

🧭 How to use this calculator

What you enter

  • Coefficient a
  • Constant b
  • Right side c

What you get

  • x

💡 Valid inputs

  • Use a non-zero value for a.
  • The equation is assumed to have the form ax + b = c.

❓ Frequently asked questions

What happens when a is zero?

If a is zero, the equation is no longer a standard linear equation in x and this calculator is not applicable.