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