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x in (-oo:+oo)
(1/3)*x+3/4 = 5/12 // - 5/12
(1/3)*x+3/4-(5/12) = 0
(1/3)*x+3/4-5/12 = 0
1/3*x+1/3 = 0 // - 1/3
1/3*x = -1/3 // : 1/3
x = -1/3/1/3
x = -1
x = -1
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