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y in (-oo:+oo)
(4/9)*y-y+2 = (1/54)*(y-6) // - (1/54)*(y-6)
(4/9)*y-((1/54)*(y-6))-y+2 = 0
(-1/54)*(y-6)+(4/9)*y-y+2 = 0
(4*y)/9-1/54*(y-6)-y+2 = 0
(-1/54*9*(y-6))/9+(4*y)/9+(9*(-y))/9+(2*9)/9 = 0
4*y-1/54*9*(y-6)+9*(-y)+2*9 = 0
23/6*y-9*y+1+18 = 0
1-31/6*y+18 = 0
19-31/6*y = 0
(19-31/6*y)/9 = 0
(19-31/6*y)/9 = 0 // * 9
19-31/6*y = 0
19-31/6*y = 0 // - 19
-31/6*y = -19 // : -31/6
y = -19/(-31/6)
y = 114/31
y = 114/31
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