Question

5. Which method would be the simplest way to solve the system? 7x + 5y = 19, -7x – 2y = -16

Answer 1

 7x + 5y = 19
-7x - 2y = -16
         3y = 3
          3     3
           y = 1
 7x + 5y = 19
7x + 5(1) = 19
   7x + 5 = 19
         -5    - 5
         7x = 14
          7      7
           x = 2
     (x, y) = (2, 1)
The method would be a elimination method (the answer is C).