Ответ:
(90-40)+20=70
(90-70)+20=40
(90-62)+20=48
(90-50)+20=60
(90-80)+20=30
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Ответ:
(90-40)+20=70
(90-70)+20=40
(90-62)+20=48
(90-50)+20=60
(90-80)+20=30