Question

2-3*(2х+2)=4х
3х+5+(х+5)=(1-х)+4
10*(х-9)=7
1-5х=-6х+8
2х+2=-3
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Answer 1

ответ:

1) x = 0.8

2) x = -1

3) x = 9.7

4) x = 7

5) x = -2.5

объяснение:

1) 2 - 3*(2x+2)=4x

2 - 6x + 6 = 4x

-6x - 4x = -2 - 6

-10x = -8

x = -8 / (-10)

x = 0.8

2) 3x+5+(x+5)=(1-x)+4

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

4x + 10 = 1 - x + 4

4x + x = -10 + 1 + 4

5x = -5

x = -5 / 5

x = -1

3) 10 * (x - 9) = 7

10x - 90 = 7

10x = 97

x = 97 / 10

x = 9.7

4) 1 - 5x = -6x + 8

6x - 5x = -1 + 8

x = 7

5) 2x + 2 = -3

2x = -3 - 2

2x = -5

x = -5 / 2

x = -2.5

Answer 2

Объяснение:

2-3*(2х+2)=4х

2-6х-6=4х

2-6=4х+6х

-4=10х

х=-2,5

3х+5+(х+5)=(1-х)+4

3х+5+х+5=1-х+4

4х+10=5-х

4х+х=5-10

5х=-5

х=-1

10*(х-9)=7

10х-90=7

10х=97

х=9,7

1-5х=-6х+8

1-8=-6х+5х

-7=-1х

х=7

2х+2=-3

2х=-3-2

2х=-5

х=-2,5