Simplifying the expression, we get:
(4x - 3y) + (4x + 3y)
= 4x - 3y + 4x + 3y
= 8x
So, the simplified expression is 8x.
Simplifying the expression, we get:
(4x - 3y) + (4x + 3y)
= 4x - 3y + 4x + 3y
= 8x
So, the simplified expression is 8x.