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(1/8)*(8-x)+1 = 0
1/8*(8-x)+1 = 0
1/8*(8-x)+1 = 0
2-1/8*x = 0
2-1/8*x = 0
2-1/8*x = 0 // - 2
-1/8*x = -2 // : -1/8
x = -2/(-1/8)
x = 16
x = 16
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