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x in (-oo:+oo)
-3*x-2 = (4/7)*x+186/7 // - (4/7)*x+186/7
-3*x-((4/7)*x)-(186/7)-2 = 0
(-4/7)*x-3*x-186/7-2 = 0
-25/7*x-200/7 = 0 // + 200/7
-25/7*x = 200/7 // : -25/7
x = 200/7/(-25/7)
x = -8
x = -8
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