Question

A) 4х=75-х б) 8х-25=40-5х в)6(х-12)=8х-2 г)3,1+5у=7(у-4,1) срочно даю 50 балов!!!!!!!!!!!!!!!!!!!!

Answer 1

Ответ:

1) 5/6х + 8 = 1/4х - 6;

5/6х - 1/4х = -6 - 8;

10/12х - 3/12х = -14;

7/12х = -14;

х = -14 * 12/7;

х = -24.

2) 1,5(2х + 5) + х = 3(0,5х - 7) + 3,5;

3х + 7,5 + х = 1,5х - 21 + 3,5;

3х + х - 1,5х = -21 + 3,5 - 7,5;

2,5х = -25;

х = -25 : 2,5;

х = -10.

3) 11/18х - 2/9 = 5/12х + 1(1/3);

11/18х - 5/12х = 1(1/3) + 2/9;

22/36х - 15/36х = 1(3/9) + 2/9;

7/36х = 1(5/9);

х = 14/9 * 36/7.

4) 2/3 * (4(1/2)х - 3/5) - 5/7 * (7/15х - 7/9) = -1(32/45).

2/3*(9/2х - 3/5) - 1/3х + 5/9 = -1(32/45);

3х - 2/5 - 1/3х = -1(32/45) - 5/9;

2(2/3)х = -1(32/45) - 25/45 + 18/45;

2(2/3)х = -1(13/15);

х = -28/15 * 3/8;

х = -0,7.

Пошаговое объяснение:

Answer 2

Прости только три решила

Answer 3

A) To solve the equation 4x = 75 - x, we can simplify it by adding x to both sides of the equation:

4x + x = 75 - x + x

Combining like terms, we get:

5x = 75

Next, we can isolate x by dividing both sides of the equation by 5:

5x/5 = 75/5

Simplifying further, we have:

x = 15

Therefore, the solution to the equation 4x = 75 - x is x = 15.

B) Let's solve the equation 8x - 25 = 40 - 5x:

To simplify the equation, we'll add 5x to both sides and add 25 to both sides:

8x + 5x - 25 + 25 = 40 + 25 - 5x + 5x

Combining like terms, we have:

13x = 65

Dividing both sides of the equation by 13, we get:

13x/13 = 65/13

Simplifying further, we have:

x = 5

Therefore, the solution to the equation 8x - 25 = 40 - 5x is x = 5.

C) Let's solve the equation 6(x - 12) = 8x - 2:

Distribute 6 to the terms inside the parentheses:

6x - 72 = 8x - 2

Next, let's subtract 6x from both sides and add 72 to both sides:

6x - 6x - 72 + 72 = 8x - 6x - 2 + 72

Simplifying the equation, we get:

0 = 2x + 70

Now, subtract 70 from both sides of the equation:

0 - 70 = 2x + 70 - 70

Simplifying further, we have:

-70 = 2x

Finally, divide both sides of the equation by 2:

-70/2 = 2x/2

Simplifying, we get:

-35 = x

Therefore, the solution to the equation 6(x - 12) = 8x - 2 is x = -35.

D) Let's solve the equation 3.1 + 5y = 7(y - 4.1):

Distribute 7 to the terms inside the parentheses:

3.1 + 5y = 7y - 28.7

Next, let's subtract 5y from both sides:

3.1 + 5y - 5y = 7y - 5y - 28.7

Simplifying the equation, we have:

3.1 = 2y - 28.7

Now, let's add 28.7 to both sides of the equation:

3.1 + 28.7 = 2y - 28.7 + 28.7

Simplifying further, we get:

31.8 = 2y

Finally, divide both sides of the equation by 2:

31.8/2 = 2y/2

Simplifying, we have:

15.9 = y

Therefore, the solution to the equation 3.1 + 5y = 7(y - 4.1) is y = 15.9.

I hope this helps! If you have any further questions, feel free to ask.