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x in (-oo:+oo)
(1/7)*(2*x-5) = -13/14 // + -13/14
(1/7)*(2*x-5)-(-13/14) = 0
(1/7)*(2*x-5)+13/14 = 0
1/7*(2*x-5)+13/14 = 0
(1/7*14*(2*x-5))/14+13/14 = 0
1/7*14*(2*x-5)+13 = 0
4*x+3 = 0
(4*x+3)/14 = 0
(4*x+3)/14 = 0 // * 14
4*x+3 = 0
4*x+3 = 0 // - 3
4*x = -3 // : 4
x = -3/4
x = -3/4
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