Question

решите пожалуйста уравннения4(5-2y)=2(1-y)4x+(11,8-x)=3,8-5x3y+2(2y-3)=8-7(y-2)5(y-7)=3(y-4)-29

Answer 1

$4(5-2y)=(1-y) \\ \\ 20-8y=2-2y \\ \\ 18=6y \\ \\ y=3$

$4x+(11,8-x)=3,8-5x-5 \\ \\ 4x-x+5x=-11,8+3,8 \\ \\ 8x=-8 \\ \\ x=-1$

$3y+2(2y-3)=8-7(y-2) \\ \\ 3y+4y-6=8-7y+14 \\ \\ 14y=28 \\ \\ y=2$

$5(y-7)=3(y-4)-29 \\ \\ 5y-35=3y-12-29 \\ \\ 2y=-6 \\ \\ y=-3$

Answer 2

20-8у=2-2у
-8у+2у=2-20
-6у= -18
у= -18:(-6)
у=3


4х+11,8-х=3,8-5х
4х-х+5х=3,8-11,8
8х= -8
х= -8:8
х= -1

3у+4у-6=8-7у+14
3у+4у+7у=8+14+6
14у=28
у=28:14
у=2

5у-35=3у-12-29
5у-3у=-12-29+35
2у=-6
у= -6:2
у= -3

Answer 3

1) 4(5-2y) = 2(1-y)

First, distribute the numbers inside the parentheses:

20 - 8y = 2 - 2y

Now, combine like terms:

20 - 2 = 8y - 2y

18 = 6y

Now, solve for y:

y = 3

2) 4x + (11.8 - x) = 3.8 - 5x

First, combine like terms:

4x + 11.8 - x = 3.8 - 5x

3x + 11.8 = 3.8 - 5x

Now, move the terms with x to one side of the equation:

3x + 5x = 3.8 - 11.8

8x = -8

Now, solve for x:

x = -1

3) 3y + 2(2y-3) = 8 - 7(y-2)

First, distribute the numbers inside the parentheses:

3y + 4y - 6 = 8 - 7y + 14

Now, combine like terms:

7y - 6 = 22 - 7y

Now, move the terms with y to one side of the equation:

7y + 7y = 22 + 6

14y = 28

Now, solve for y:

y = 2

4) 5(y-7) = 3(y-4) - 29

First, distribute the numbers inside the parentheses:

5y - 35 = 3y - 12 - 29

Now, combine like terms:

5y - 3y = -12 + 29 - 35

2y = -18

Now, solve for y:

y = -9

So, the solutions to the given equations are y = 3, x = -1, y = 2, and y = -9.