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(1/7)*x+1/2 = 5/2 // - 5/2
(1/7)*x+1/2-(5/2) = 0
(1/7)*x+1/2-5/2 = 0
1/7*x-2 = 0 // + 2
1/7*x = 2 // : 1/7
x = 2/1/7
x = 14
x = 14
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