I guarantee maximum don't know the solution 0.4z-3/1.5z+9=7/5
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Here is your solution
![\frac{0.4z - 3}{1.5z + 9} = \frac{7}{5} \\ \\ 0.20z - 15 = 10.5z + 63 \\ 0.20z - 10.5z = 63 + 15 \\ - 10.3z = 78 \\ z = \frac{78}{ - 10.3} \\ \\ z = - \frac{78 \times 10}{103} \\ \\ z= - 7.57 \frac{0.4z - 3}{1.5z + 9} = \frac{7}{5} \\ \\ 0.20z - 15 = 10.5z + 63 \\ 0.20z - 10.5z = 63 + 15 \\ - 10.3z = 78 \\ z = \frac{78}{ - 10.3} \\ \\ z = - \frac{78 \times 10}{103} \\ \\ z= - 7.57](https://tex.z-dn.net/?f=+%5Cfrac%7B0.4z+-+3%7D%7B1.5z+%2B+9%7D++%3D++%5Cfrac%7B7%7D%7B5%7D++%5C%5C++%5C%5C+0.20z+-+15+%3D+10.5z+%2B+63+%5C%5C+0.20z+-+10.5z+%3D+63+%2B+15+%5C%5C++-+10.3z+%3D+78+%5C%5C+z+%3D++%5Cfrac%7B78%7D%7B+-+10.3%7D++%5C%5C++%5C%5C+z+%3D+++-+%5Cfrac%7B78+%5Ctimes+10%7D%7B103%7D++%5C%5C++%5C%5C++z%3D+-+7.57)
dipshikhadas28:
it's wrong
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