Question

3х+5=х-7 дам 12 балов​

Answer 1

3x-x=-7-5

2x=-12

x= -6

........

Answer 2

Ответ:

3х+5=х-7

3х-х = -7-5

2х = -12

х = -6

Проверка:

3 × (-6)+5=-6-7

-18+5=-13

-13=-13