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8*x-((4*x)/8)+1 = 7 // - 7
8*x-((4*x)/8)-7+1 = 0
8*x+(-1/2)*x-7+1 = 0
15/2*x-6 = 0 // + 6
15/2*x = 6 // : 15/2
x = 6/15/2
x = 4/5
x = 4/5
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