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(5*x-16)/8 = (9*x-9)/10 // - (9*x-9)/10
(5*x-16)/8-((9*x-9)/10) = 0
(5*x-16)/8+(-1*(9*x-9))/10 = 0
(10*(5*x-16))/(8*10)+(-1*8*(9*x-9))/(8*10) = 0
10*(5*x-16)-1*8*(9*x-9) = 0
-22*x-88 = 0
(-22*x-88)/(8*10) = 0
(-22*x-88)/(8*10) = 0 // * 8*10
-22*x-88 = 0
-22*x-88 = 0 // + 88
-22*x = 88 // : -22
x = 88/(-22)
x = -4
x = -4
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