Question

fill in the blanks :-)
i) 3/7 = 9/?



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Answer 1

Answer:

21

Step-by-step explanation:

Let the unknown number be x

3/7=9/x

By cross multiplication,

3×x=7×9

3x=63

x=63/3

x=21

Answer 2

Step-by-step explanation:

3/7 =9/?

3×3 = 9

7×3 = 21

so ? = 21