You should evaluate with numbers other than 0, because sometimes using x = 0 will give a false equivalency.
Equivalent Expressions
-0.58x + 2.27 and 7.037 - 1.798x / 3.1
Non-Equivalent Expressions
-0.58x + 2.27 and 7.037 - 2.798x / 3.1
If we evaluate the expressions, for x = 0, the values are equivalent.
If we substitute x = 1 we get 1.69 on the left and approximately 1.37 on the right.