Solve C_{M}=frac{C_{m}}{MM}=20*10^-3/44*10^-3

$$C _ { M } = \frac { C _ { m } } { M M } = \frac { 20 \times 10 ^ { - 3 } } { 44 \times 10 ^ { - 3 } }$$

Evaluate (complex solution)

$$C_{M}=\frac{C_{m}}{M^{2}}\text{ and }\frac{C_{m}}{M^{2}}=\frac{5}{11}$$

Solve for M

$$M=-\sqrt{\frac{C_{m}}{C_{M}}}$$

$$M=\sqrt{\frac{C_{m}}{C_{M}}}\text{, }C_{M}=\frac{5}{11}\text{ and }C_{m}>0$$

Solve for C_m

$$C_{m}=\frac{5M^{2}}{11}$$

$$M\neq 0\text{ and }C_{M}=\frac{5}{11}$$