Systems of linear equations in two variable

The method of elimination is the other way to solve the equation, and I think it is faster and easier way to solve the equations. During the elimination, there are few steps we should follow:

1 Obtain same coefficient for one variable in both equations

2 Add/subtract equations to get rid of one variable 

3 Substitute the answer to solve for the other variable

4 Check the answer in both original equations

          

Also, we learned the graphical interpreation of solutions, and there have thhree kinds answers:

1 Exactly one solution                             Two lines intersect at one point

2 Infinitely many solutions                        Two lines are identical

3 No solution                                          Two lines are parallel