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