demo.mws
Numerical solutions of linear equations
x + 3*y = 4 2*x - y = 1
x + y = 2 x + y = 4
x + 3*y = 4 -2*x - 6*y = -8
Graphical solutions of linear equations
x + 3*y = 4 2*x - y = 1
x + y = 2 x + y = 4
Answer to Where the 2nd Line Went
x + 3*y = 4 -2*x - 6*y = -8