Fill in the blanks to make the statements true.

3x5 is divisible by 9 of the digit x is ………………. .


We know that a number is a multiple of 9 if the sum of its digits is divisible by 9.


3 + x + 5 = x + 8


x + 8 is divisible by 9 if x + 8 = 9, which gives x = 1.


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