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(1/8)*(8*x-1) = -9/4-(7/4) // + -9/4-(7/4)
(1/8)*(8*x-1)-(-9/4)+7/4 = 0
(1/8)*(8*x-1)+9/4+7/4 = 0
1/8*(8*x-1)+9/4+7/4 = 0
(1/8*4*(8*x-1))/4+9/4+7/4 = 0
1/8*4*(8*x-1)+7+9 = 0
4*x+7+17/2 = 0
4*x+31/2 = 0
(4*x+31/2)/4 = 0
(4*x+31/2)/4 = 0 // * 4
4*x+31/2 = 0
4*x+31/2 = 0 // - 31/2
4*x = -31/2 // : 4
x = -31/2/4
x = -31/8
x = -31/8
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