linear equations in two variables

linear equations in two variables

1. Linear equations in one variable have one and only one solution.

   • You have already learnt this!
   • 2x+8-4=6 etc

2. Linear equations in two variables may have more than one solution

   • You are learning about this now!
   • Ex: 1.2s+3t=5, p+4q=7 et cetera

3. Solutions of linear equations does not change when the same number is subtracted or added to both LHS and RHS

   • or when you multiply or divide both sides by a non-zero number

4. Any equation which can be put in the form ax+by+c=0, where a, b and c are real numbers and a and b are both non-zero, is called a linear equation in two variables.