0.4+3=0.2(3x+1)-x3.4-0.6x=2x-(0.4x+1)0.8x-(0.7x+0.36)=7.1x-0.5=2(0.3x-0.2)6(x-1)=9.4-1.7x

Ответ:

Пошаговое изъясненье:

0.4х+3=0.2(3x+1)-x

0.4х+3=0.6х+0.2-х

0.4х-0.6х+х=0.2-3

0.8х=-2.8

х=-2.8:0.8

х=-3.5

3.4-0.6x=2x-(0.4x+1)

3.4-0.6х=2х-0.4х-1

-0.6х-2х+0.4х=-1-3.4

-2.2х=-4.4

х=-4.4:(-2.2)

х=2

0.8x-(0.7x+0.36)=7.1

0.8х-0.7х-0.36=7.1

0.8х-0.7х=7.1+0.36

0.1х=7.46

х=7.46:0.1

х=74.6

x-0.5=2(0.3x-0.2)

х-0.5=0.6х-0.4

х-0.6х=0.5-0.4

0.4х=0.1

х=0.1:0.4

х=0.25

6(x-1)=9.4-1.7x

6х-6=9.4-1.7х

6х+1.7х=9.4+6

7.7х=15.4

х=15.4:7.7

х=2

3.5-9a=2(0.5a-4)

3.5-9а=а-8

-9а-а=-8-3.5

-10а=-11.5

а=-11.5:(-10)

а=1.15

3(2.4-1.1m)=2.7m+3.2

7.2-3.3м=2.7м+3.2

-3.3м-2.7м=3.2-7.2

-6м=-4

м=-4:(-6)

м=4/6=2/3

-3(y+2.5)=6.9-4.2y

-3у-7.5=6.9-4.2у

-3у+4.2у=6.9+7.5

1.2у=14.4

у=14.4:1.2

у=12

0.5y+7=5(0.2+1.5y)

0.5у+7=1+7.5у

0.5у-7.5у=1-7

-7у=-6

у=-6:(-7)

у=6/7

4(x-0.8)=3.8x-5.8

4х-3.2=3.8х-5.8

4х-3.8х=3.2-5.8

0.2х=-2.6

х=-2.6:0.2

х=--13