Question

In meet give the answer​

Answer 1

Answer:

sum=(2x+5y+4z)+(9x-7y-3z)

2x+9x+5y-7y+4z-3z

11x-2y+z

Step-by-step explanation:

this is your answer

Answer 2

$= 2x + 5y + 4z + 9x - 7y - 3y$

$= 2x + 9x + 5y - 10y + 4z$

$= 11x - 5y + 4z$