Answer: The answer simplified is 16x+8y
Step-by-step explanation: Here is how I've done it: 5x+3x+2y+4y and 6x+2x+8y-6y
5x+3x=8x 2y+4y=6y you put them together 8x+6y. and now the other one, 6x+2x+8y-6y. 6x+2x=8x 8y-6y=2y then you put them together, 8x+2y. now you add those two expressions 8x+8x=16x and 6y+2y=8y so it's more like adding/subtracting like terms.
so the answer is 16x+8y