помогите пожалуйста примеры 5 класс 1)39/57=13/8x-5 2)5x-6/9=70/45. Created by Pingvinenok. matematika-ru

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Pingvinenok @Pingvinenok

August 2022 1 7 Report

помогите пожалуйста примеры 5 класс
1)39/57=13/8x-5 2)5x-6/9=70/45

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prettypushkova

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1) 39/57 = 13/8х - 5 2) 5х - 6/9 = 70/45
13/8х = 39/57 + 5 5х = 70/45 + 6/9
13/8х = 5 39/57 5х = 70/45 + 30/45
13/8х = 324/57 5х = 100/45 = 20/9
х = 324/57 : 13/8 х = 20/9 : 5
х = 324/57 * 8/13 х = 20/9 * 1/5
х = 2592/741 = 3 369/741 х = 20/45
х = 3 123/247 х = 4/9

2 votes Thanks 5

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