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x in (-oo:+oo)
0.4/3.4 = x/13.6 // - x/13.6
0.4/3.4-(x/13.6) = 0
0.4/3.4-0.07352941*x = 0
0.11764706-0.07352941*x = 0 // - 0.11764706
-0.07352941*x = -0.11764706 // : -0.07352941
x = -0.11764706/(-0.07352941)
x = 1.60000005
x = 1.60000005
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