Explanation:
The question is to combine the equations, so we should add them.
- 2x -4y = -26
+ - 3x -3y = - 12
(same signs add, different signs subtract)
-5x -7y = -38
(in the question there are two boxes at the side of the eqaution you should put (+)sign there as youre adding them)
If this question was supposed to be subtracted it would give a while different ans)