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3 = (x/2)/(-2) // - (x/2)/(-2)
3-((x/2)/(-2)) = 0
(1/4)*x+3 = 0
1/4*x+3 = 0 // - 3
1/4*x = -3 // : 1/4
x = -3/1/4
x = -12
x = -12
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