Question

The algebraic expression dminus−20 is not equivalent to 20minus−d because

Answer 1

d - 20 is = to d + (-20)
20 - d is = to 20 + (-d)
-d + 20 is not the same as
d + (-20).

Answer 2

Because given expression are not same.

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=
`d-20`

20 minus d=
`20-d=-(d-20)`

Hence,20 minus d is negative times of d minus 20.

Therefore, the given expression are not equivalent because given expression are not same.