Assessment Problem:

Is there a value for x that will make the following statement true?

(6x-8-15x)+12>(6x-8-15x)+6

Mathematical Issues:

This task encourages students to think intuitively about the problem rather than resort to formal procedures.

Common Responses:

(something) + 12 > (something) + 6

(something) + 6 > (something)

This is always true

Domain:

Algebraic Relations

Theme:

Inequalities

Research References:

(Lim, 2006)