Question

1) 3x+7=O 2) 5x+(3x+7)=9

Answer 1

3х=7,х=7:3=2.3 !х=2.3

Answer 2

1) 3х+7=0
3х=-7
Х=-7/3
Х= - 2 целых 1/3
2)5х+(3х+7)=9
5х+3х+7=9
8Х=9-7
8х=2
Х=2/8
Х=1/4
Х=0,25
Ответ:1)-2 цел 1/3
2) 0,25