(13 + 2х + х) · 4 = 228
13 + 3х = 228 : 4
13 + 3х = 57
3х = 57 - 13
3х = 44
х = 44 : 3
х = 44/3
х = 14 целых 2/3
(13+2x+x)×4=228
13+2x+x=228×4
13+3x=2
(13 + 2х + х) · 4 = 228
13 + 3х = 228 : 4
13 + 3х = 57
3х = 57 - 13
3х = 44
х = 44 : 3
х = 44/3
х = 14 целых 2/3
(13+2x+x)×4=228
13+2x+x=228×4
13+3x=2