Question

Реши уравнение 7х+27=6х+21 0,3*(5х-7)=3*(0,2х+3,2) 56+6х=3х-13 7*(2х-5)=4*(3-х)-11 5(х+1,2)=12,5х 0,9*(4у-2)=0,5*(3у-4)+4,4 Помогите пожалуйста срочно !! За рание спасибо

Answer 1

Держи)))))))))))))))))))

Answer 2

Solving the Equations

Let's solve each equation step by step:

1. Equation 1: 7x + 27 = 6x + 21

To solve this equation, we need to isolate the variable x on one side of the equation. We can do this by subtracting 6x from both sides and subtracting 21 from both sides:

7x + 27 - 6x = 6x + 21 - 6x x + 27 = 21

Now, subtract 27 from both sides to isolate x:

x + 27 - 27 = 21 - 27 x = -6

Therefore, the solution to Equation 1 is x = -6.

2. Equation 2: 0.3(5x - 7) = 3(0.2x + 3.2) + 56

To solve this equation, we can start by simplifying both sides:

1.5x - 2.1 = 0.6x + 9.6 + 56 1.5x - 2.1 = 0.6x + 65.6

Next, we can subtract 0.6x from both sides:

1.5x - 0.6x - 2.1 = 0.6x - 0.6x + 65.6 0.9x - 2.1 = 65.6

Now, add 2.1 to both sides:

0.9x - 2.1 + 2.1 = 65.6 + 2.1 0.9x = 67.7

Finally, divide both sides by 0.9 to solve for x:

0.9x / 0.9 = 67.7 / 0.9 x = 75.22

Therefore, the solution to Equation 2 is x = 75.22.

3. Equation 3: 6x = 3x - 13

To solve this equation, we can start by subtracting 3x from both sides:

6x - 3x = 3x - 3x - 13 3x = -13

Next, divide both sides by 3 to solve for x:

3x / 3 = -13 / 3 x = -13/3

Therefore, the solution to Equation 3 is x = -13/3.

4. Equation 4: 7(2x - 5) = 4(3 - x) - 11

To solve this equation, we can start by simplifying both sides:

14x - 35 = 12 - 4x - 11

Next, combine like terms:

14x - 35 = -4x + 1

Now, add 4x to both sides:

14x + 4x - 35 = -4x + 4x + 1 18x - 35 = 1

Finally, add 35 to both sides:

18x - 35 + 35 = 1 + 35 18x = 36

Divide both sides by 18 to solve for x:

18x / 18 = 36 / 18 x = 2

Therefore, the solution to Equation 4 is x = 2.

5. Equation 5: 5(x + 1.2) = 12.5x + 0.9(4y - 2)

To solve this equation, we can start by simplifying both sides:

5x + 6 = 12.5x + 3.6y - 1.8

Next, subtract 12.5x from both sides:

5x - 12.5x + 6 = 12.5x - 12.5x + 3.6y - 1.8 -7.5x + 6 = 3.6y - 1.8

Now, add 1.8 to both sides:

-7.5x + 6 + 1.8 = 3.6y - 1.8 + 1.8 -7.5x + 7.8 = 3.6y

Finally, divide both sides by 3.6 to solve for y:

(-7.5x + 7.8) / 3.6 = (3.6y) / 3.6 -2.083x + 2.167 = y

Therefore, the solution to Equation 5 is y = -2.083x + 2.167.

I hope this helps! Let me know if you have any further questions.