Question

if 5x21 s divisible by 9, find the value of digit x.
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Answer 1

Answer:

x is 1,4 or 7

Step-by-step explanation:

Answer 2

Answer:

x = 1

Step-by-step explanation:

Divisibility rule of 9 :-

If sum of digits of number is divisible by 9 then number itself is divisible by 9.

So, 5 + x + 2 + 1 = 9

8 + x = 9

x = 9 - 8

x = 1

So your needed answer is 1