Question

(a×16-720):30=400-392

Answer 1

(16а - 720) : 30 = 400 - 392

(16а - 720) : 30 = 8

16а - 720 = 8 * 30

16а - 720 = 240

16а = 240 + 720

16а = 960

а = 960 : 16

а = 60

Answer 2

(а×16):30=400-392
(16а-720):30=80
16а-720=8 * 30
16а-720=240
16а=240+720
а=960:16
а=60
Ответ:60