(x-3)(y+4)=12
12 = 1 * 12 = 2 * 6 = 3 * 4 = 4 * 3 = 6 * 2 = 12 * 1
Avem 6 cazuri:
x - 3 = 1
y + 4 = 12 => x = 4, y = 8
x - 3 = 2
y + 4 = 6 => x = 5, y = 2
x - 3 = 3
y + 4 = 4 => x = 6, y = 0
x - 3 = 4
y + 4 = 3 => x = 7, y = -1 nu convine
x - 3 = 6
y + 4 = 2 => x = 9, y = -2 nu convine
x - 3 = 12
y + 4 = 1 => x = 15, y = --3 nu convine
