Question

21x5 is multiple of 9 find x.​

Answer 1

Step-by-step explanation:

x = 6

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Answer 2

Answer:

After doing question l can say some logical tips 21x5 is a multiple of 9 that means 21x5 is divided by 9.

we know that any number add its digit and its come in 9 of multiple that also divided by 9.

That means the sum of digit of number.

21x5=(21×1+x+5)

8+x=9

x=9-8

x=1

The number be 2115.

l hope it is useful for you.

thank you:)