To double-check your answers for linear equations, you can try these simple techniques:

1. Substitution:

   • Put your answer back into the original equation.
   • Check if both sides of the equation are equal. If they are, your answer is correct!

2. Graphing:

   • Draw the equation on a graph.
   • Look for the points where the lines meet. Make sure your answer matches these points.

3. Estimation:

   • Round the numbers to make the math easier.
   • See if your estimated answer is close to the one you got.

4. Using Different Methods:

   • Try solving the equation in a different way (like elimination or using a matrix).
   • Compare this new answer with your original to see if they match.

Using these methods can help you feel more sure about your answers!