Beräkna (complex solution)
\frac{A}{C}=\frac{2n}{B}\text{ and }\frac{2n}{B}=\frac{9N}{2BC}\text{ and }\frac{9N}{2BC}=7
Lös ut n
n=\frac{9N}{4C}
A=7C\text{ and }B=\frac{9N}{14C}\text{ and }C\neq 0\text{ and }N\neq 0
Lös ut N
N=\frac{14BC}{9}
A=7C\text{ and }B\neq 0\text{ and }C\neq 0\text{ and }n=\frac{7B}{2}
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