Verified Answer :

21x(9)=9x21
21y= 9x21
Y=9x21/21
Y=9x1
Y=9

Answer: The correct answer is 9.

Step-by-step explanation:

Multiplication property of equality is defined as the property in which the a number multiplied on one side of the equation must be multiplied to the other side of the equation with the same sign.

\(a\times c=b\times c\)

c is multiplied on both the sides of the reaction.

In the given question:

\(21\times x=9\times 21\)

Thus, the value of 'x' will be 9 by associative property.

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