Question

12х(х-8)-4х(3х-5)=10-26;      5х-2(х-4)=9х+23;      11х-(3х+4)=9х-7;

Answer 1

12х(х-8)-4х(3х-5)=10-26

12хв квадрате-96-12х в квадрате-20х=-16

20х=80

х=4

5х-2(х-4)=9х+23

5х-2х+8=9х+23

3х-9х=23-8

-6х=15

х=-2.5

11х-(3х+4)=9х-7

11х-3х-4=9х-7

-х=-4

х=

 

Answer 2

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

1. 12x(x - 8) - 4x(3x - 5) = 10 - 26

First, simplify the equation:

12x^2 - 96x - 12x^2 + 20x = -16

Now, combine like terms:

-76x = -16

Now, isolate x by dividing both sides by -76:

x = -16 / -76 x = 2/19

So the solution to the first equation is x = 2/19.

2. 5x - 2(x - 4) = 9x + 23

First, distribute the -2 on the left side of the equation:

5x - 2x + 8 = 9x + 23

Now, combine like terms:

3x + 8 = 9x + 23

Next, move the 3x term to the right side of the equation by subtracting 3x from both sides:

8 = 6x + 23

Now, subtract 23 from both sides:

-15 = 6x

Finally, divide by 6 to isolate x:

x = -15 / 6 x = -5/2

So the solution to the second equation is x = -5/2.

3. 11x - (3x + 4) = 9x - 7

First, simplify the equation by removing the parentheses:

11x - 3x - 4 = 9x - 7

Now, combine like terms on both sides of the equation:

8x - 4 = 9x - 7

Next, move the 8x term to the right side by subtracting 8x from both sides:

-4 = x - 7

Now, add 7 to both sides to isolate x:

-4 + 7 = x

3 = x

So the solution to the third equation is x = 3.