Answer:
x = 2
Explanation:
DE is parallel to AC and intersects the other 2 sides, thus divides those 2 sides in proportion, that is
=
( cross- multiply )
6x = 4(x + 1) , that is
6x = 4x + 4 ( subtract 4x from both sides )
2x = 4 ( divide both sides by 2 )
x = 2