Two-Step Equation Solver
How It Works
This two-step equation solver uses established formulas to provide accurate results.
The basic rule:
- ax + b = c → x = (c - b) / a
- Step 1: Subtract b from both sides
- Step 2: Divide both sides by a
Results are estimates. Consult a professional for critical decisions.
Frequently Asked Questions
What is a two-step equation?
A two-step equation requires two operations to solve. The standard form is ax + b = c, where you first subtract b, then divide by a. For example, 3x + 7 = 22.
What are the two steps to solve ax + b = c?
Step 1: Subtract b from both sides to get ax = c - b. Step 2: Divide both sides by a to get x = (c - b)/a. Always undo addition/subtraction first, then multiplication/division.
Why do you subtract before dividing?
Following the reverse order of operations, you undo addition and subtraction first because they were the last operations applied to x. Then undo multiplication. This works inward toward x.
How do you check a two-step equation?
Plug your answer back in. For 3x + 7 = 22 with x = 5: 3(5) + 7 = 15 + 7 = 22 ✓. Both sides match, confirming the solution.