Предмет: Математика, автор: Nfdinv

a) (3x+5)+(8 x + 1)=17
б) 19-5(3х-1) = 9
в) 7x-4=x- 16
г) 13-5х=8 - 2x
3у-(5-y=11
e) (8х+11) -13 = 9х-5
3) 30+5(х -1)=35х-25​

надо найти чему равен Х !!!​

Приложения:

Ответы

Автор ответа: xioxxie
1

Ответ:

а)(3х+5)+(8х+1)=17

3х+5+8х+1=17

11х=-5-1+17

11х=11

х=11/11

х=1

б)19-5(3х-1)=9

19-15х+5=9

15х=-19-5+9

15х=-15

х=-15/15

х=-1

в)7х-4=х-16

7х-х=4-16

6х=-12

х=-12/6

х=-2

г)13-5х=8-2х

-5х+2х=-13+8

-3х=-5

х=-5/-3

д)3у-(5-у)=11

3у-5+у=11

3у+у=5+11

4у=16

у=16/4

у=4

е)(8х+11)-13=9х-5

8х+11-13=9х-5

8х-9х=-11+13-5

-х=-3

ж)30+5(х-1)=35х-25

30+5х-5=35х-25

5х-35х=-30+5-25

-30х=-50

х=-50/-30

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