Answe its for a sophia determined that the expression    is equivalent to  –2x  –  5 by using the steps below.

 

expression:    

expression:   –2x  –  5

step 1:
choose a value of  x

choose  .

choose  .

step 2: substitute





step 3: evaluate





step 4:
compare

since  –3  =  –3, the two expressions are equivalent.

which explains whether sophia is correct?