Determine whether the given pair (x, y) is a solution of the given system of linear equations in each number. 1. (2, 3); x- y = - 2
3x + y = 3

2. (1, 1); 2x + 7y = 9
3x - 10y = -7

3. (-2, -1); 5x - 3y = -7
-x - y = 3

4. (0, 0 ); 8x - 4 y = 0
2x + 3y = 7

5. (1, 0); 3x = 3y + 3
y = 5x - 5