Question

Which expressions are equivalent to 12r - 5?

Answer 1

Any real number can substitute for r, because there is not equal sign. As for expressions equivalent to 12r - 5, here are some:

3(4)r - 5

(6 + 6)r - (2^2 + 1)

(24 * 1/2)r + (-5)

The point is, there are countless expressions to represent 12r - 5