$$ \begin{aligned} 107328\cdot(1-x^{8+1})-107328\cdot(1-x) &= (1-x)\cdot933400&& \text{simplify left and right hand side} \\[1 em]107328\cdot(1-x^9)-107328\cdot(1-x) &= 933400-933400x&& \\[1 em]107328-107328x^9-(107328-107328x) &= -933400x+933400&& \\[1 em]107328-107328x^9-107328+107328x &= -933400x+933400&& \\[1 em]107328-107328x^9-107328+107328x &= -933400x+933400&& \\[1 em]-107328x^9+107328x &= -933400x+933400&& \text{move all terms to the left hand side } \\[1 em]-107328x^9+107328x+933400x-933400 &= 0&& \text{simplify left side} \\[1 em]-107328x^9+1040728x-933400 &= 0&& \\[1 em] \end{aligned} $$

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