Linear Equation Calculator
Solve a linear equation of the form ax + b = c for the unknown x.
Calculate
Enter your values below.
Result
x =
0
Formula used
ax + b = c → x = (c − b) ÷ a
Example: 2x + 3 = 11 → x = 4.
How to use this calculator
- Enter a (coefficient of x), b, c.
- Press Calculate to see your result instantly.
FAQ
Frequently asked questions
What is a linear equation?
An equation where the highest power of the variable is 1, forming a straight line when graphed.
Why can't a be zero?
If a is zero, x drops out of the equation entirely, so there's no unique solution to solve for.
Can a, b, and c be negative or decimal?
Yes, all three can be any real number.
How is this solved?
By isolating x: subtract b from both sides, then divide by a.