#### Understanding

Two expressions are equivalent if they have the same value for every possible replacement for the variable or variables.

### What to look for

Some statements can be true for many values of a variable or variables but not true for others. For example, “multiplication” makes things larger is true if you are multiplying whole numbers greater than 1.

### Sample Assessment

Which expression is equivalent to 8(x-2) + 4(3-x) - 2x?

Answer: 2x-4