A) 7
B) 9
C) 8
D) 12
Correct Answer: A
Solution :
Let required number be x. According to the question, \[21x-12x=63\] \[\Rightarrow \]\[9x=63\]\[\Rightarrow \]\[x=\frac{63}{9}=7\]You need to login to perform this action.
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