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y in (-oo:+oo)
(1/4)*y-3 = 1/3 // - 1/3
(1/4)*y-(1/3)-3 = 0
(1/4)*y-1/3-3 = 0
1/4*y-10/3 = 0 // + 10/3
1/4*y = 10/3 // : 1/4
y = 10/3/1/4
y = 40/3
y = 40/3
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