Question

Подробно! Решите уравнения: Первое -3х-1=0 второе 2х+7=5 третье 5х-2=0 четвёртое 9-4х=1 пятое 3у-11=1-2у шестое 2(у+2)=-3(у-1) седьмое у+4=2у-5 восьмое 7(у-3)=-2(у+3) Заранее спасибо!

Answer 1

1) -3х=0+1
-3х=1
х=-1/3
2)2х=5-7
2х=-2
х=-1
дальше сам решишь по этому образцу

Answer 2

Solving the Equations

Let's solve the given equations step by step.

1. First Equation: - The first equation is: -3x - 1 = 0 - To solve for x, we can add 1 to both sides and then divide by -3.

Adding 1 to both sides: - -3x = 1

Dividing by -3: - x = -1/3

Therefore, the solution for the first equation is: x = -1/3.

2. Second Equation: - The second equation is: 2x + 7 = 5 - To solve for x, we can subtract 7 from both sides and then divide by 2.

Subtracting 7 from both sides: - 2x = -2

Dividing by 2: - x = -1

Therefore, the solution for the second equation is: x = -1.

3. Third Equation: - The third equation is: 5x - 2 = 0 - To solve for x, we can add 2 to both sides and then divide by 5.

Adding 2 to both sides: - 5x = 2

Dividing by 5: - x = 2/5

Therefore, the solution for the third equation is: x = 2/5.

4. Fourth Equation: - The fourth equation is: 9 - 4x = 1 - To solve for x, we can subtract 9 from both sides and then divide by -4.

Subtracting 9 from both sides: - -4x = -8

Dividing by -4: - x = 2

Therefore, the solution for the fourth equation is: x = 2.

5. Fifth Equation: - The fifth equation is: 3y - 11 = 1 - 2y - To solve for y, we can combine like terms and then solve for y.

Combining like terms: - 3y + 2y = 1 + 11 - 5y = 12

Dividing by 5: - y = 12/5

Therefore, the solution for the fifth equation is: y = 12/5.

6. Sixth Equation: - The sixth equation is: 2(y + 2) = -3(y - 1) - To solve for y, we can distribute and then solve for y.

Distributing: - 2y + 4 = -3y + 3

Combining like terms: - 2y + 3y = 3 - 4 - 5y = -1

Dividing by 5: - y = -1/5

Therefore, the solution for the sixth equation is: y = -1/5.

7. Seventh Equation: - The seventh equation is: y + 4 = 2y - 5 - To solve for y, we can subtract y from both sides and then solve for y.

Subtracting y from both sides: - 4 = y - 5

Adding 5 to both sides: - y = 9

Therefore, the solution for the seventh equation is: y = 9.

8. Eighth Equation: - The eighth equation is: 7(y - 3) = -2(y + 3) - To solve for y, we can distribute and then solve for y.

Distributing: - 7y - 21 = -2y - 6

Combining like terms: - 7y + 2y = 21 - 6 - 9y = 15

Dividing by 9: - y = 15/9 - y = 5/3

Therefore, the solution for the eighth equation is: y = 5/3.

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