Reši naslednje sisteme enačb.
a) 2x + y = 3, x – 3y + 2 = 0
b) 7x + 2y = 18, 3x – y = 4
c) 2x + 3y + 5 = 13, 5y – 2x – 8 = 0
a) x = 1, y = 1
b) x = 2, y = 2
c) x = 1, y = 2