Question

1) -9•(х-7)+17•(х-1)=0 2)-7•(2х-3)+5•(3х-2)=0 3) 5(х+4)=9х+12 4)8-5(4-4х) =18​

Answer 1

1) -9•(х-7)+17•(х-1)=0

-9x + 63 + 17x - 17 = 0

8x + 46 = 0

x = -46/8

x = -5.75

2)-7•(2х-3)+5•(3х-2)=0

-14x + 21 + 15x - 10 = 0

x + 11 = 0

x = -11

3) 5(х+4)=9х+12

5x + 20 = 9x + 12

8 = 4x

x = 2

4)8-5(4-4х) = 18​

8 - 20 + 20x = 18

20x = 30

x = 1.5

Answer 2

Ответ:1)-46/8 2)-11 3)2 4)3/2

Пошаговое объяснение:1)-9x+63+17x-17=0

8x+46=0

8x=-46

x=-46/8

2)-14x+21+15x-10=0

x+11=0

x=-11

3)5x+20=9x+12

5x-9x=-20+12

-4x=-8

x=2

4)8-20+20x=18

20x=-8+20+18

20x=30

x=3/2

Answer 3

Let's solve each of these equations step by step:

1. -9*(x-7) + 17*(x-1) = 0

First, distribute the -9 and 17 on the left side of the equation:

-9x + 63 + 17x - 17 = 0

Combine like terms:

8x + 46 = 0

Now, isolate x by moving 46 to the other side:

8x = -46

Divide both sides by 8 to solve for x:

x = -46/8 x = -23/4

2. -7*(2x-3) + 5*(3x-2) = 0

Distribute the -7 and 5 on the left side:

-14x + 21 + 15x - 10 = 0

Combine like terms:

(15x - 14x) + (21 - 10) = 0

x + 11 = 0

Isolate x:

x = -11

3. 5(x+4) = 9x + 12

Distribute the 5 on the left side:

5x + 20 = 9x + 12

Move 5x to the right side:

20 = 9x + 12 - 5x

Combine like terms:

20 = 4x + 12

Subtract 12 from both sides:

8 = 4x

Now, divide by 4 to solve for x:

x = 8/4 x = 2

4. 8 - 5(4 - 4x) = 18

Distribute the -5 inside the parentheses:

8 - 20 + 20x = 18

Combine like terms:

-12 + 20x = 18

Add 12 to both sides:

20x = 18 + 12

20x = 30

Now, divide by 20 to solve for x:

x = 30/20 x = 3/2 or 1.5

So, the solutions for each equation are:

1. x = -23/4
2. x = -11
3. x = 2
4. x = 3/2 or 1.5