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-((1/7)*x)-4 = 3*x-(226/7) // - 3*x-(226/7)
226/7-((1/7)*x)-(3*x)-4 = 0
(-1/7)*x-3*x+226/7-4 = 0
198/7-22/7*x = 0 // - 198/7
-22/7*x = -198/7 // : -22/7
x = -198/7/(-22/7)
x = 9
x = 9
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