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6.3*(x-9) = 1-((1/2)*x) // - 1-((1/2)*x)
6.3*(x-9)+(1/2)*x-1 = 0
6.3*(x-9)+x/2-1 = 0
(2*6.3*(x-9))/2+x/2+(-1*2)/2 = 0
2*6.3*(x-9)+x-1*2 = 0
13.6*x-113.4-2 = 0
13.6*x-115.4 = 0
(13.6*x-115.4)/2 = 0
(13.6*x-115.4)/2 = 0 // * 2
13.6*x-115.4 = 0
13.6*x-115.4 = 0 // + 115.4
13.6*x = 115.4 // : 13.6
x = 115.4/13.6
x = 8.48529412
x = 8.48529412
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