Question

X - 4 x + 5 Y - 4 Y - Y + 2 X + x​

Answer 1

( x + 2x + x - 4x )+(5y-4y-y)

=(4x-4x ) +(y-y)

= 0

Answer 2

First group the X's

X-4x+2x+x

Then y's

+5y-4y-y

Now group them together after solving-

X-4x+2x+x=0

+5y-4y-y=0

So,0+0=0

Your answer is 0