Linear Equation Solver
Solve ax + b = c for x, with the answer substituted back as a check.
Results
x
6.00000000
Result
31.00000000
What this tool does
The simplest equation there is, and still the one most often needed: isolate x by undoing each operation in reverse. The second result puts the answer back into the original equation, so you can see that it really balances.
Formula
ax + b = c ⟹ x = (c − b) ÷ a
Variables
| Symbol | Meaning | Unit |
|---|---|---|
a | Coefficient a | — |
b | Coefficient b | — |
c | Coefficient c | — |
X | x | — |
CH | Result | — |
Worked example
- Coefficient a4
- Coefficient b7
- Coefficient c31
- x6.00000000
- Result31.00000000
Limitations
- The calculation runs at full precision and only the display is rounded. If you copy an intermediate value and retype it, small differences can appear.