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(3/8)*(x-7) = 1/8 // - 1/8
(3/8)*(x-7)-(1/8) = 0
(3/8)*(x-7)-1/8 = 0
3/8*(x-7)-1/8 = 0
(3/8*8*(x-7))/8-1/8 = 0
3/8*8*(x-7)-1 = 0
3*x-22 = 0
(3*x-22)/8 = 0
(3*x-22)/8 = 0 // * 8
3*x-22 = 0
3*x-22 = 0 // + 22
3*x = 22 // : 3
x = 22/3
x = 22/3
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