$$ \begin{aligned} 1000-2x\cdot100+10+10+2x\cdot10-1 &= 0&& \text{simplify left side} \\[1 em]1000-200x+10+10+20x-1 &= 0&& \\[1 em]-180x+1019 &= 0&& \text{ move the constants to the right } \\[1 em]-180x &= -1019&& \text{ divide both sides by $ -180 $ } \\[1 em]x &= \frac{-1019}{-180}&& \\[1 em]x &= \frac{1019}{180}&& \\[1 em] \end{aligned} $$

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