\[4(z - 6) - 3(z - 3) = 8\]
\[4z - 24 - 3z + 9 = 8\]
\[z - 15 = 8\]
\[z = 8 + 15\]
\[z = 23\]
Ответ: 23
\[-6(6 - x) - 5x = 18\]
\[-36 + 6x - 5x = 18\]
\[x = 18 + 36\]
\[x = 54\]
Ответ: 54