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x in (-oo:+oo)
-((2/3)*x)-7/8 = -179/168 // + -179/168
-((2/3)*x)-7/8-(-179/168) = 0
(-2/3)*x-7/8+179/168 = 0
4/21-2/3*x = 0 // - 4/21
-2/3*x = -4/21 // : -2/3
x = -4/21/(-2/3)
x = 2/7
x = 2/7
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