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kiselevp22
@kiselevp22
August 2022
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3 класс уравнение (20 * х - 70): 5 = 90
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fanta2310
Verified answer
(20х - 70) : 5 = 90
20х - 70 = 90 * 5
20х - 70 = 450
20х = 450 + 70
20х = 520
х = 520 : 20
х = 26
-------------------------
(20 * 26 - 70) : 5 = 90
(520 - 70) : 5 = 90
450 : 5 = 90
90 = 90
Ответ: х = 26
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Answers & Comments
Verified answer
(20х - 70) : 5 = 9020х - 70 = 90 * 5
20х - 70 = 450
20х = 450 + 70
20х = 520
х = 520 : 20
х = 26
-------------------------
(20 * 26 - 70) : 5 = 90
(520 - 70) : 5 = 90
450 : 5 = 90
90 = 90
Ответ: х = 26