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x in (-oo:+oo)
-205/56 = (6/7)*x+7*x+5/8 // - (6/7)*x+7*x+5/8
-((6/7)*x)-(7*x)-205/56-(5/8) = 0
(-6/7)*x-7*x-205/56-5/8 = 0
-55/7*x-30/7 = 0 // + 30/7
-55/7*x = 30/7 // : -55/7
x = 30/7/(-55/7)
x = -6/11
x = -6/11
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