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1.49*(212/100)*(1109*x+180) = 19684 // - 19684
1.49*(212/100)*(1109*x+180)-19684 = 0
3.1588*(1109*x+180)-19684 = 0
3.1588*(1109*x+180)-19684 = 0
3503.1092*x-19115.416 = 0
3503.1092*x-19115.416 = 0
3503.1092*x-19115.416 = 0 // + 19115.416
3503.1092*x = 19115.416 // : 3503.1092
x = 19115.416/3503.1092
x = 5.45670001
x = 5.45670001
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