Question

Розв'язати систему способом підстановки x-y=1; x+2y=7.

Answer 1

Ответ:

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Объяснение:

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Answer 2

Solving the System of Equations by Substitution

To solve the system of equations x - y = 1 and x + 2y = 7 using the method of substitution, we can start by solving one of the equations for one variable and then substituting that expression into the other equation.

1. Solve the first equation for x: - x = y + 1

2. Substitute the expression for x into the second equation: - (y + 1) + 2y = 7 - y + 1 + 2y = 7 - 3y + 1 = 7 - 3y = 6 - y = 2

3. Substitute the value of y back into the expression for x: - x = 2 + 1 - x = 3

4. Therefore, the solution to the system of equations is: - x = 3 - y = 2

So, the solution to the system of equations x - y = 1 and x + 2y = 7 is x = 3 and y = 2.