Answer:
[tex]\boxed{\mathrm{Option \ A}}[/tex]
Step-by-step explanation:
=> [tex](x+y)+(2(x+y)+3)=9[/tex]
Solving the bracket
=> [tex]x+y+2x+2y+3 = 9[/tex]
=> [tex]3x+3y = 9-3[/tex]
=> [tex]3(x+y) = 6[/tex]
Dividing both sides by 3
=> [tex]x+y = 2[/tex]
A) 3 - 1 = 2 ← (Correct Answer)
B) -3+1 = -2
C) -3-1 = -4
D) 3+1 = 4
E) 9-31 = -22