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Home > MC2 > Chapter 3 > Lesson 3.1.3 > Problem 3-30


Visualize a number line. Move your point 6 spaces to the right, and then 18 spaces to the left. Where is your point now located?


Find the difference between 25 and 12. The sign (positive or negative) of the solution is that of the larger number.


Since both numbers have the same sign, add them together. The solution will have that sign (positive or negative).

See parts (a) or (b).