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x in (-oo:+oo)
-596/77 = 6*x+(6/7)*x-4 // - 6*x+(6/7)*x-4
4-(6*x)-((6/7)*x)-596/77 = 0
(-6/7)*x-6*x-596/77+4 = 0
-48/7*x-288/77 = 0 // + 288/77
-48/7*x = 288/77 // : -48/7
x = 288/77/(-48/7)
x = -6/11
x = -6/11
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