Question

Решите систему уравнений: {3x-y=7, {2x+3y=1. 7 класс! 1 Смотреть ответ razinoleg razinoleg Ответ:2; -1Объяснение:y = 3х - 72 х + 3 (3х-7)=12х+9х-21=111х = 22х = 2y = 3·2 - 7y = -1 Спасибо!

Answer 1

Solving the System of Equations

To solve the system of equations:

3x - y = 7
2x + 3y = 1

we can use the method of substitution or elimination. Let's use the method of substitution.

First, let's solve the first equation for y:

3x - y = 7
y = 3x - 7

Now, substitute this expression for y in the second equation:

2x + 3(3x - 7) = 1
2x + 9x - 21 = 1
11x - 21 = 1
11x = 22
x = 2

Substitute the value of x back into the first equation to find y:

3(2) - y = 7
6 - y = 7
-y = 1
y = -1

Therefore, the solution to the system of equations is x = 2 and y = -1.

Note: The solution provided above is based on the given system of equations. However, it is always a good practice to double-check the solution by substituting the values of x and y back into the original equations to ensure they satisfy both equations.