Question

2-5y-(5-2y)=2y-9-(9-4y)

Answer 1

2-5у-(5-2у)=2у-9-(9-4у)
2-5у-5+2у=2у-9-9+4у
-5у+2у-2у-4у=-9-9-2+5
-9у=-15
у=-15/-9=5/3

Answer 2

2-5y+(-5+2y)=2y-9-(9-4y)
-3y-3=2y-9-(9-4y)
-3y-3=2y-9+(-9+4y)
-3y-3=6y-18
-9y=3-18
-9y=-15
$y= frac{5}{3}$