Question

Как решить пример (43-z)×17=289

Answer 1

(43-Z)x17=289,
43-z=289:17,
43-z=17,
z=43-17,
z=26.
Проверка:
(43-26)x17=17x17=289.

Answer 2

(43-z)*17-289=0
731-17z-289=0
17z-442=0
17z=442
Z=442:17
Z=26