this week I learn systems of linear equations and substation. if they intersect then they are solution. such as 1 solution :m
1=/ m2, 2 solution m1=m2, coincident solution also is m1=m2. 
this week I learn systems of linear equations and substation. if they intersect then they are solution. such as 1 solution :m1=/ m2, 2 solution m1=m2, coincident solution also is m1=m2.