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Home > AC > Chapter 4 > Lesson 4.1.7 > Problem 4-65

4-65.

For a tile pattern with the rule (where represents the figure number and represents the number of tiles), which figure number has tiles in it? How do you know?  

Given information:
number of tiles
figure number
tiles total?

Substitute the given information.
number of tiles (figure number)

Solve for .

Figure

Check your answer.