Explanation:
Two expressions are equivalent if we can arrange one of them in order to match the other. If we evaluate the two expressions for certain values in the input, we must get the same value in the output. In this exercise, we have the following expression:
[tex]a-2.87[/tex]
There are infinitely many equivalent expressions. We can write some of them:
[tex]\bullet \ 2a-a-2.87 \\ \\ \bullet \ a-1-1.87 \\ \\ \bullet \ 5a-4a-5.87+3[/tex]
Because when simplifying these expressions we get:
[tex]a-2.87[/tex]
