Wyznacz wskazane wielkości k=7n; n a=kk+6; k z=7-y; y d=a+bc; c x=2k+1; k 2k-7n+5; n

k=7n /:7 n=k/7 a=kk+6 kk=a-6 /√ k=√a-6 z=7-y y=7-z d=a+bc bc=d-a /:b c=d-a /b x=2k+1 2k=x-1 /:2 k=x-1 /2 2k=7n+5 7n=2k-5 /:7 n=2k-5/7

k = 7n /:7 n = k / 7 a = kk + 6 a = k² + 6 k² = a - 6 k = √a - 6 z = 7 - y y + z = 7 y = 7 - z d = a + bc d - a = bc /:b c = d - a / b x = 2k+1 x - 1 = 2k /:2 k = x - 1 / 2 2k = 7n + 5 2k - 5 = 7n /:7 n = 2k - 5 / 7