1)2x+7=x-1 2) 3(x+5)=x+3. 3)2x-2(2x+3)=x-9

Question

1)2x+7=x-1 2) 3(x+5)=x+3. 3)2x-2(2x+3)=x-9

Answer 1

2x+7=x-1
x=-1-7
x=-8
--------------
3(x+5)=x+3
3x+15=x+3
2x=-12
x=-6
-----------------
2x-2(2x+3)=x-9
2x-4x-6=x-9
-3x=-3
x=1
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Answer 2

1. 2х+7=х-1

2х-х= -7-1

х=-8

2. 3(x+5)= x+3

3x+3*5=x+3

3x-x=-15+3

2x= -12

x= -6

3. 2x-2(2х+3)=х-9

2х-4х+6=х-9

2х-4х-х=6-9

-3х=-3

х=1