a:20=40*3... 210:с=420:6...
а:20=40*3
а=20*40*3=2400
210/с=420/6
70с=210
с=3
______________________________________
(это проверка)
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Verified answer
а:20=40*3
а=20*40*3=2400
210/с=420/6
70с=210
с=3
Verified answer
______________________________________
(это проверка)
======================================
______________________________________