What expression is equivalent to (-5) - 8?

Two expressions are said to be equivalent if they have the same value irrespective of the value of the variable (s) in them.

Step-by-step explanation:Consider the expressions 32+1 and 5*2. Both are equal to 10. That is, they are equivalent expressions.

Now let us consider some expressions that include variables, say 5x+2.

The expression can be rewritten as 5x+2=x+x+x+x+x+1+1.

We can re-group the right side of the equation to 2x+3x+1+1 or x+4x+2 or some other combination. All these expressions have the same value, whenever the same value is substituted for x. That is, they are equivalent expressions.