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x-((0.18*12*x-13500)/12)-(0.01*x) = 0
x-((0.18*12*x-13500)/12)-0.01*x = 0
(-1*(2.16*x-13500))/12+x-0.01*x = 0
(-1*(2.16*x-13500))/12+(12*x)/12+(-0.01*12*x)/12 = 0
12*x-1*(2.16*x-13500)-0.01*12*x = 0
9.84*x-0.12*x+13500 = 0
9.72*x+13500 = 0
(9.72*x+13500)/12 = 0
(9.72*x+13500)/12 = 0 // * 12
9.72*x+13500 = 0
9.72*x+13500 = 0 // - 13500
9.72*x = -13500 // : 9.72
x = -13500/9.72
x = -1388.88888889
x = -1388.88888889
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