\left\{ \begin{array} { c } { a = c + d } \\ { d s a = 0.1 c + d } \\ { d = \frac { 2 } { 3 } \times 0.55 a } \\ { a + e = b + d } \end{array} \right.
Solve for a, c, d, s, b
s=\frac{817}{1100\left(b-e\right)}\text{, }a=\frac{30\left(b-e\right)}{19}\text{, }c=b-e\text{, }d=\frac{11\left(b-e\right)}{19}\text{, }b\neq e
s\in \mathrm{R}\text{, }a=0\text{, }c=0\text{, }d=0\text{, }b=e\approx 2.718281828
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