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(1/2)*x-(5*x)-2/5 = -47/5 // + -47/5
(1/2)*x-(5*x)-2/5-(-47/5) = 0
(1/2)*x-5*x-2/5+47/5 = 0
9-9/2*x = 0 // - 9
-9/2*x = -9 // : -9/2
x = -9/(-9/2)
x = 2
x = 2
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