Equation Solver
Solve a linear equation ax + b = c, step by step.
What is an equation solver?
An equation solver finds x in a linear equation ax + b = c. Example: 3x + 5 = 20 gives x = 5.
How to use it
Enter a, b and c, then tap Solve for x. The working steps are shown below the answer.
Formula
For ax + b = c, first subtract b from both sides, then divide by a: x = (c – b) / a.
Example
Solve 3x + 5 = 20. First subtract 5 from both sides: 3x = 20 – 5 = 15. Then divide both sides by 3: x = 15 / 3 = 5. Check: 3 × 5 + 5 = 20.
Frequently Asked Questions
What is x in 3x + 5 = 20?
5.
What if a is 0?
The equation has no x term, so it cannot be solved for x.
Does it show steps?
Yes, every step is shown under the answer.
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