How to solve
Two-step equations wrap x in addition/subtraction and then multiplication. Undo the outer layer first (clear the constant term), then undo the coefficient, so each inverse operation peels one layer off both sides.
Steps
- Undo addition or subtraction to isolate the ax term.
- Divide both sides by the coefficient of x.
- Verify by substituting the value back in.
Example
Solve 2x + 7 = 15.
- Subtract 7 from both sides: 2x = 8.
- Divide by 2: x = 4.
Answer: 4
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