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13*x+8*x-9 = (3/4)*(16-(24*x)) // - (3/4)*(16-(24*x))
13*x-((3/4)*(16-(24*x)))+8*x-9 = 0
(-3/4)*(16-24*x)+13*x+8*x-9 = 0
13*x-3/4*(16-24*x)+8*x-9 = 0
13*x-3/4*(16-24*x)+8*x-9 = 0
31*x+8*x-12-9 = 0
39*x-12-9 = 0
39*x-21 = 0
39*x-21 = 0
39*x-21 = 0 // + 21
39*x = 21 // : 39
x = 21/39
x = 7/13
x = 7/13
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