Help me please, the words that got cut off were exponent by 1

System: 
 2x - y = -13
 y = x + 9
 The solution is:
 (x, y) = (-4, 5)

 System: 
 x + y = 7
 x - y = -1
 The solution is:
 (x, y) = (3, 4)

 System: 
 y = 3x - 7
 y = 2x - 5
 The solution is:
 (x, y) = (2, -1)

 System: 
 3x + 2y = 10
 6x - y = 10
 The solution is:
 (x, y) = (2, 2)

 System: 
 4x - 3y = 5
 3x + 2y = -9
 The solution is:
 (x, y) = (-1, -3)