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8*(x+2)+(4*x)/2-(x/2) = 19 // - 19
8*(x+2)+(4*x)/2-(x/2)-19 = 0
8*(x+2)+2*x-x/2-19 = 0
(2*8*(x+2))/2+(2*2*x)/2-x/2+(-19*2)/2 = 0
2*8*(x+2)+2*2*x-x-19*2 = 0
20*x-x-38+32 = 0
19*x-38+32 = 0
19*x-6 = 0
(19*x-6)/2 = 0
(19*x-6)/2 = 0 // * 2
19*x-6 = 0
19*x-6 = 0 // + 6
19*x = 6 // : 19
x = 6/19
x = 6/19
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