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(-7/2)*x+2*x-(5/2) = -15/2 // + -15/2
(-7/2)*x+2*x-(5/2)-(-15/2) = 0
(-7/2)*x+2*x-5/2+15/2 = 0
5-3/2*x = 0 // - 5
-3/2*x = -5 // : -3/2
x = -5/(-3/2)
x = 10/3
x = 10/3
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