Răspuns :
(48 x c + 216) : 40 = 27
(48 x c + 216) = 40 x 27
48 x c + 216 = 1080
48 x c = 1080 - 216
48 x c = 864
c = 864 : 48
c = 18
(48 x c + 216) = 40 x 27
48 x c + 216 = 1080
48 x c = 1080 - 216
48 x c = 864
c = 864 : 48
c = 18