What is the Linear Equation Solver?
Solve a linear equation of the form ax + b = c.
Enter a, b and c and the Linear Equation Solver returns x. Results update as you type, and nothing you enter leaves your device.
How it is calculated
ax + b = c, so x = (c − b) ÷ a
How to use it
- Enter a.
- Enter b.
- Enter c.
- Read x in the results panel. It updates as you type.
- Change any value to compare scenarios, or use Share to send the result as a link.
Worked example
Common questions
What formula does the Linear Equation Solver use?
It uses: ax + b = c, so x = (c − b) ÷ a.
What do I need to use the Linear Equation Solver?
You need a, b and c. Sensible starting values are filled in so you can see how it works straight away.
Is the Linear Equation Solver free, and is my data stored?
It is free with no sign-up. The calculation runs in your browser, so the values you enter are not sent to or stored on our server.