Два уровнения 1) 25+(x-2)•15=70 2) 72:(12-x:4)=9. Created by Ekaterina1236252. matematika-ru

Два уровнения 1) 25+(x-2)•15=70 2) 72:(12-x:4)=9...

July 2022 2 1 Report

Два уровнения

1) 25+(x-2)•15=70

2) 72:(12-x:4)=9

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Verified answer

1) 25 + 15х-30 =70
15х = 70+30-25
15х = 75
х = 5
Ответ: 5
2) 72:(12 - х/4) = 9
12-х/4 = 72/9
12-х/4 = 8
х/4 = 12-8
х/4 = 4
х = 4*4 = 16
Ответ: 16

2 votes Thanks 1

Зебра3331 1) 25 + (х-2) * 15=70
(х-2)*15=70-25
(х-2)*15=45
(х-2)=45:15
(х-2)=3
х=3+2
х=5
_______
25 + (5-2)*15=70

2) 72 : (12-х:4)=9
(12-х:4)= 72:9
(12-х:4)=8
12-(х:4)=8
(х:4)=12-8
х:4=4
х=16
_________
72 : (12-16:4)=9

0 votes Thanks 0

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