Предмет: Математика, автор: kamillatahmazan

Помогите пожалуйста. Линейные уравнения 6 класс a)3x=-21 б)-2/5х=3/10 в)0,5х+0,15=0 г)0,3p-5=6-0,7p д)(6-2х)+4=-5х-3 е)(2х+3)-(5х+11)=7+(13-2х)​

Ответы

Автор ответа: fiffifafa135679
2

Ответ:

а) 3x=-21

x=-21÷3

x=-7

б) -2/5х=3/10

x=3/10÷(-2/5)

x=3/4

в) 0,5х+0,15=0

0,5x=-0,15

x=-0,15÷0,5

x=-3

г) 0,3p-5=6-0,7p

0,3p+0,7p=6+5

1p=11

p=11÷1

p=11

д) (6-2х)+4=-5х-3

6-2х+4=-5х-3

-2x+5x=-3-2

3x=-5

x=-5÷3

x=-5/3

е) (2х+3)-(5х+11)=7+(13-2х)

2x+3-5x-11=7+13-2x

-3x-8=20-2x

-3x+2x=20+8

-x=28

x=-28

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