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-3 = (-5/2)*x-((7/2)*x)+10 // - (-5/2)*x-((7/2)*x)+10
(7/2)*x-((-5/2)*x)-10-3 = 0
(5/2)*x+(7/2)*x-10-3 = 0
6*x-13 = 0 // + 13
6*x = 13 // : 6
x = 13/6
x = 13/6
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