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Slope of a line
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Calculators / Math / Linear equation
Linear equation calculator
Solve a one-variable linear equation in the form ax + b = c.
On this page
Solution x5
Calculator controls
How to calculate
Solve a one-variable linear equation in the form ax + b = c.
Solution x = (c-b)/a
Worked example
Coefficient a: 3; Constant b: 5; Right side c: 20.
Solution x: 5 .
Assumptions and limits
Coefficient a must be nonzero.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Solve a one-variable linear equation in the form ax + b = c. The displayed figures use the inputs and formula shown on this page.
When this tool is useful
Use the linear equation to compare a scenario, check an estimate, or verify a manual calculation.
Understanding your inputs
| Input | What to enter |
|---|---|
| Coefficient a | Enter a number of at least -1000000000000 and no more than 1000000000000. |
| Constant b | Enter a number of at least -1000000000000 and no more than 1000000000000. |
| Right side c | Enter a number of at least -1000000000000 and no more than 1000000000000. |
Frequently asked questions
What should I check before using the linear equation result?
Coefficient a must be nonzero.
Is this linear equation result exact?
It is exact for the stated mathematical model and entered values. Real-world results can differ when rates, timing, fees, definitions or measurement conditions differ.