$$\frac{ 5500 }{ 21 } = \frac{ 44 }{ 21 } \times 3x$$
$x = \frac{125}{3} = 41\frac{2}{3} \approx 41.666666667$
$$\frac{5500}{21}=\frac{44\times 3}{21}x$$
$$\frac{5500}{21}=\frac{132}{21}x$$
$$\frac{5500}{21}=\frac{44}{7}x$$
$$\frac{44}{7}x=\frac{5500}{21}$$
$$x=\frac{5500}{21}\times \frac{7}{44}$$
$$x=\frac{5500\times 7}{21\times 44}$$
$$x=\frac{38500}{924}$$
$$x=\frac{125}{3}$$
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