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x=-2*sin(x)-(1/2) equation

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Numerical solution:

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The solution

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x = -2*sin(x) - 1/2
$$x = - 2 \sin{\left(x \right)} - \frac{1}{2}$$
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Numerical answer [src]
x1 = -0.167185160630923
x1 = -0.167185160630923