Question

Fill in the blanks

$\frac{3}{7} = \frac{9}{}$
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Answer 1

Answer:

I think 21 will be in blank space

Answer 2

$\huge\color{aqua}\implies\huge \bold \red{ Answer}$

${\frac{3}{7} = \frac{9}{x}} \\ {3x = 7 \times 9} \\ 3x = 63 \\ x = \frac{63}{3} \\ x = 21$