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(4/5)*x-2 = x-(1/2) // - x-(1/2)
(4/5)*x-x+1/2-2 = 0
-1/5*x-3/2 = 0 // + 3/2
-1/5*x = 3/2 // : -1/5
x = 3/2/(-1/5)
x = -15/2
x = -15/2
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