Question 355443
Add corresponding sides of the two equations.  -3x and 3x will cancel each other out, giving 3y+y = 3+9, or 4y = 12, or y = 3.  Using the 2nd equation, 3x + 3 = 9, or 3x = 6, or x = 2.  Therefore the solution is the ordered pair (2, 3).