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16)
![frac{1}{3x - 5} = 1 \ 3x - 5 = 1 \ 3x = 1 + 5 \ 3x = 6 \ x = 2 frac{1}{3x - 5} = 1 \ 3x - 5 = 1 \ 3x = 1 + 5 \ 3x = 6 \ x = 2](https://tex.z-dn.net/?f=+frac%7B1%7D%7B3x+-+5%7D++%3D+1+%5C+3x+-+5+%3D+1+%5C+3x+%3D+1+%2B+5+%5C+3x+%3D+6+%5C+x+%3D+2)
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![frac{1}{5x + 1} = 5 \ 5x + 1 = frac{1}{5} \ 5x = frac{1}{5} - 1 = - frac{4}{5} \ x = - frac{4}{25} frac{1}{5x + 1} = 5 \ 5x + 1 = frac{1}{5} \ 5x = frac{1}{5} - 1 = - frac{4}{5} \ x = - frac{4}{25}](https://tex.z-dn.net/?f=+frac%7B1%7D%7B5x+%2B+1%7D++%3D+5+%5C+5x+%2B+1+%3D++frac%7B1%7D%7B5%7D++%5C+5x+%3D++frac%7B1%7D%7B5%7D++-+1+%3D++-++frac%7B4%7D%7B5%7D++%5C+x+%3D++-++frac%7B4%7D%7B25%7D+)
18)
![frac{1}{10x - 9} = 5 \ 10x - 9 = frac{1}{5} \ 10x = 9 + frac{1}{5} = frac{46}{5} \ x = frac{46}{50} = frac{23}{25} frac{1}{10x - 9} = 5 \ 10x - 9 = frac{1}{5} \ 10x = 9 + frac{1}{5} = frac{46}{5} \ x = frac{46}{50} = frac{23}{25}](https://tex.z-dn.net/?f=+frac%7B1%7D%7B10x+-+9%7D++%3D+5+%5C+10x+-+9+%3D++frac%7B1%7D%7B5%7D++%5C+10x+%3D+9+%2B++frac%7B1%7D%7B5%7D++%3D++frac%7B46%7D%7B5%7D++%5C+x+%3D++frac%7B46%7D%7B50%7D++%3D++frac%7B23%7D%7B25%7D+)
19)
![frac{1}{2x + 3} = 5 \ 2x + 3 = frac{1}{5} \ 2x = frac{1}{5} - 3 = - frac{14}{5} \ x = - frac{14}{10} = - frac{7}{5} frac{1}{2x + 3} = 5 \ 2x + 3 = frac{1}{5} \ 2x = frac{1}{5} - 3 = - frac{14}{5} \ x = - frac{14}{10} = - frac{7}{5}](https://tex.z-dn.net/?f=+frac%7B1%7D%7B2x+%2B+3%7D++%3D+5+%5C+2x+%2B+3+%3D++frac%7B1%7D%7B5%7D++%5C+2x+%3D++frac%7B1%7D%7B5%7D++-+3++%3D++-++frac%7B14%7D%7B5%7D++%5C+x+%3D++-++frac%7B14%7D%7B10%7D++%3D++-++frac%7B7%7D%7B5%7D+)
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