85z-27-19(1+z)=43 (1-z)+91+91z

85z- 27 - 19*(1 + z)= 43*(1 - z)+91 +91z85z - 27 - 19 - 19z= 43 - 43z + 91 + 91z85z - 19z + 43z - 91z = 43 + 91 + 27 + 1918z = 180z= 180/18z=10Проверка:85*10-27-19*(1+10)=43*(1-10)+91+91*10614=614Ответ: z = 10