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1/4 = -x/8 // + -x/8
1/4-(-x/8) = 0
(1/8)*x+1/4 = 0
1/8*x+1/4 = 0 // - 1/4
1/8*x = -1/4 // : 1/8
x = -1/4/1/8
x = -2
x = -2
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