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4*(1/2)*x = 4*x-10 // - 4*x-10
4*(1/2)*x-(4*x)+10 = 0
4*(1/2)*x-4*x+10 = 0
10-2*x = 0 // - 10
-2*x = -10 // : -2
x = -10/(-2)
x = 5
x = 5
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