I don't understand what you've done with S1... You should just multiply the equation by 2 and then subtract the second equation from the first...
To solve a system of 3 linear equations, a student splits it into 2 subsystems as follows:
Solve both sub systems. and state what your solution (if one exists) tells you about the original system of 3 linear equations.
I've tried solving the 1st one and the 2nd by using the elimination method..
im stuck from this point..how do i get rid of the 1/1/2 so it ll just be x.
is this correct for system 2?
what will the solution tell me about the original system of 3 linear equations.?