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