Question

Решить : 1-2(5-2х)=-х-4; 1-7(4+2х)=-9-4х; 5-2х=11-7(х+2); -2(5-3х)=7х+3; 3х+5+(х+5)=(1-х)+4; 10х+9=7х; -х-2+3(х-3)=3(4-х)-3

Answer 1

1-2(5-2х)=-х-4

1-10+4x=-x-4

5x=5 |:5

x=1

1-7(4+2х)=-9-4х

1-28-14x=-9-4x

-10x=18

x=-18/10

x=-9/5

5-2х=11-7(х+2)

5-2x=11-7x-14

5x=-8

x=-8/5

-2(5-3х)=7х+3;

-10+6x=7x+3

-x=13 |:(-1)

x=-13

3х+5+(х+5)=(1-х)+4

3x+5+x+5=1-x+4

5x=-5 |:5

x=-1

10х+9=7х

3x=-9

x=-3

-х-2+3(х-3)=3(4-х)-3

-x-2+3x-9=12-3x-3

5x=20

x=4

Answer 2

Ответ:

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