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Home > GC > Chapter 9 > Lesson 9.1.5 > Problem 9-51

9-51.

Write and solve an equation based on the geometric relationship shown at right.  

A triangle where the base is 30, x, minus 4. An internal line parallel to the base and bisecting the other two side has a length, 12, x, Plus 7.

Although you do not have dimensions, you can write an equation by examining the relationship between the side lengths.

, so .