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(1/2)*x+3 = 17-(3*x) // - 17-(3*x)
(1/2)*x+3*x-17+3 = 0
7/2*x-14 = 0 // + 14
7/2*x = 14 // : 7/2
x = 14/7/2
x = 4
x = 4
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