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x in (-oo:+oo)
3.7 = x/8.7 // - x/8.7
3.7-(x/8.7) = 0
3.7-0.11494253*x = 0
3.7-0.11494253*x = 0 // - 3.7
-0.11494253*x = -3.7 // : -0.11494253
x = -3.7/(-0.11494253)
x = 32.18999965
x = 32.18999965
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