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(11/2)*x-(7/2) = 15/2 // - 15/2
(11/2)*x-(7/2)-(15/2) = 0
(11/2)*x-7/2-15/2 = 0
11/2*x-11 = 0 // + 11
11/2*x = 11 // : 11/2
x = 11/11/2
x = 2
x = 2
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