add the following 1)3x+2y and x +y

1) (3x+2y)+(x+y)
=3x+2y+x+y
=3x+x+2y+y
=4x+3y
2)
x+y+3+3x+2y+5
=x+3x+y+2y+3+5
=4x+3y+8