Solve for a, b, c, r (complex solution)
r=15\text{, }a=7b+1\text{, }b\in \mathrm{C}\text{, }c=\frac{7}{4}=1.75
r\in \mathrm{C}\text{, }a=4bc+1\text{, }b=-\frac{1+8c-r}{4c-7}\text{, }c\neq \frac{7}{4}
Solve for a, b, c, r
r=15\text{, }a=7b+1\text{, }b\in \mathrm{R}\text{, }c=\frac{7}{4}=1.75
r\in \mathrm{R}\text{, }a=4bc+1\text{, }b=-\frac{1+8c-r}{4c-7}\text{, }c\neq \frac{7}{4}
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