Question 60487
5x + 2y = -1
2x - y = -13

a) - y = - 2x - 13
   -1 (-y = - 2x - 13)
   y = 2x + 13

b) 5x + 2 (2x + 13) = -1
   5x + 4x + 26 = -1
   9x = -1 - 26
   9x = -27
   x = -27 / 9
   x = -3

c) y = 2x + 13
   y = 2 (-3) + 13
   y = -6 + 13
   y = 7