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-6*x-(8/9) = 248/63-((4/7)*x) // - 248/63-((4/7)*x)
(4/7)*x-6*x-(8/9)-(248/63) = 0
(4/7)*x-6*x-8/9-248/63 = 0
-38/7*x-304/63 = 0 // + 304/63
-38/7*x = 304/63 // : -38/7
x = 304/63/(-38/7)
x = -8/9
x = -8/9
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