Предмет: Математика, автор: CR1STYLE

12x+5-(7-3x)=13 помогите пожалуйста

Ответы

Автор ответа: Julsy

12х + 5 -7+3х = 13
15х -2 = 13
15х = 13+2
15х = 15
Х = 15:15
Х = 1
-------------
Проверка
12*1 + 5-(7-3*1)= 13
12 + 5 - 4 = 13
13 = 13

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