a = 0.8000000000000007 (slider from -5 to 5, step 0.1)
b = -1.4999999999999996 (slider from -5 to 5, step 0.1)
c = -5 (slider from -5 to 5, step 0.1)
d = 0.4000000000000007 (slider from -5 to 5, step 0.1)
f = -1 (slider from -5 to 5, step 0.1)
e = 0.5000000000000007 (slider from -5 to 5, step 0.1)
g_1: a x + b y = c
g_2: d x + e y = f
S = Intersect(g_2, g_1)
T1: "S ( " + (x(S)) + " | " + (y(S)) + " ) "