CPM Homework Help : INT1 Problem 11-93

Write an equation and solve for $x$ .

Hint:

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

Answer:

$2(12x+7)=30x−4,\text{ so }x=3.$

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.