Предмет: Математика, автор: ps3xaker

Помогите пожалуйста, совсем нет времени.
Даю 50 баллов.

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Ответы

Автор ответа: irina11111132
0
е)5х-4(х-3)=-20
5х-4х+12=-20
х+12=-20
х=32
Автор ответа: arinaches90
0
а) 9-0,9х=0
9-0=0,9х
х=9:0,9
х=10
б) (8х+1)-(5х+3)=7
8х+1-5х-3=7
8х-5х=7-1+3
3х=9
х=3
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