x = 24a + 11 x = 12·(2a) + 11 ⇒ r = 11
y = 36b + 22 y = 36b + 12 + 10 y = 12(3b+ 1) + 10 r= 10
b) n = 3x + 2y = 72a + 33 + 72b + 44 = 72a + 72b + 72 + 5 = 72(a + b + 1) + 5
n ÷ 72 = a+b+1 rest = 5
c) 15x +5y = 5(3x + y) =5·nr. impar⇒ Uc= 5 (x = nr. impar,3x = nr impar, y = nr. par)