Решите уровнение: 1)...

Question

Решите уровнение:

1) 3x-1=2(x-2)

2)3(x+5)=7-5x

3)19(y-9)=3(y+7)

4)4(x-9)=3(x-8)

5)3(2x-9)=5(x-4)

6)7(3-2x)=15(1-x)

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Answer 1

3х-1=2(х-2)

3х-1=2х-4

3х-2х=-4+1

х=-3

===============

3(х+5)=7-5х

3х+15=7-5х

3х+5х=7-15

8х=-8

х=-8:8

х=-1

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19(у-9)=3(у+7)

19у-171=3у+21

19у-3у=171+21

16у=192

у=192:16

у=12

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4(х-9)=3(х-8)

4х-36=3х-24

4х-3х=36-24

х=12

===============

3(2х-9)=5(х-4)

6х-27=5х-20

6х-5х=27-20

х=7

===============

7(3-2х)=15(1-х)

21-14х=15-15х

15х-14х=15-21

х=-6

 

Answer 2

а)3х-1=2(х-2)

3х-1=2х-4

3х-2х=-4+1

х=-3