Answer:
Because given expression are not same.
Step-by-step explanation:
We are given that an expression
d minus 20
We are given that the given algebraic expression is not equivalent to 20 minus d why.
d minus 20=[tex]d-20[/tex]
20 minus d=[tex]20-d=-(d-20)[/tex]
Hence,20 minus d is negative times of d minus 20.
Therefore, the given expression are not equivalent because given expression are not same.