Question

Дана система двух линейных уравнений y+7x=2 4y-7x=4 найдите значение переменной y ответ в виде десятичной дроби

Answer 1

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Answer 2

Ответ:

Объяснение:

y+7x=2

4y-7x=4

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складываем

5y = 6; ⇒ y = 6:5 = 1,2

Ответ: 1,2

Answer 3

Given System of Equations:

The given system of equations is:

Equation 1: y + 7x = 2 Equation 2: 4y - 7x = 4

To find the value of the variable y, we can solve these equations simultaneously.

Solving the System of Equations:

To solve the system of equations, we can use the method of substitution or elimination. Let's use the method of elimination.

We can eliminate the variable x by adding Equation 1 and Equation 2 together. This will result in the elimination of the x term, allowing us to solve for y.

Adding Equation 1 and Equation 2:

(y + 7x) + (4y - 7x) = 2 + 4 Simplifying the equation: 5y = 6 Dividing both sides of the equation by 5: y = 6/5

Therefore, the value of the variable y is 6/5.

Conclusion:

The value of the variable y in the given system of equations y + 7x = 2 and 4y - 7x = 4 is 6/5.