Question

допоможіть (28-4x)*4+8=40

Answer 1

(28-4х)*4+8=40
(28-4х)*4=40-8
(28-4х)*4=32
28-4х=32:4
28-4х=8
28-8=4х
4х=20
х=20:4
х=5

Проверка:
(28-4*5)*4+8=40
(28-20)*4+8=40
8*4+8=40
32+8=40
40=40