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x in (-oo:+oo)
(2/7)*(x-(1/4)) = 7/6 // - 7/6
(2/7)*(x-(1/4))-(7/6) = 0
(2/7)*(x-1/4)-7/6 = 0
2/7*(x-1/4)-7/6 = 0
(2/7*6*(x-1/4))/6-7/6 = 0
2/7*6*(x-1/4)-7 = 0
12/7*x-52/7 = 0
(12/7*x-52/7)/6 = 0
(12/7*x-52/7)/6 = 0 // * 6
12/7*x-52/7 = 0
12/7*x-52/7 = 0 // + 52/7
12/7*x = 52/7 // : 12/7
x = 52/7/12/7
x = 13/3
x = 13/3
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