Question

3y-2x+z-2x+3(x+y)

A. -x+4y+z
B. -x+6y+z
C. x+4y+z
D. 3x+4+z

Answer 1

Answer is B

Answer 2

3y - 2x + z - 2x + 3(x + y) --- distribute through the parenthesis
3y - 2x + z - 2x + 3x + 3y -- now combine like terms
-2x - 2x + 3x = -4x + 3x = -x
3y + 3y = 6y
and then there is the z
put it all together and you get :
-x + 6y + z

Just thought you might want to see how the answer was found :)