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x in (-oo:+oo)
7*x+6*x+1/4 = 365/4 // - 365/4
7*x+6*x+1/4-(365/4) = 0
7*x+6*x+1/4-365/4 = 0
13*x-91 = 0 // + 91
13*x = 91 // : 13
x = 91/13
x = 7
x = 7
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