Question

А){х+у=12 {х-у=2 б){2х+у=10 {х-у=2 Посмотреть ответы KRISTINAweb KRISTINAweb Ответ:а) (7; 5) б) (4; 2)Пошаговое объяснение:Коэффициенты при игрек противоположны. Поэтому сложим уравнения.х+х+у-у=12+22х=14х=14:2х=7Теперь подставим икс в первое уравнение.7+у=12у=12-7у=5Коэффициенты при игрек противоположны. Поэтому сложим уравнения.2х+х+у-у=10+23х=12х=12:3х=4Теперь подставим икс во второе уравнение.4-у=2у=4-2у=2 narqiz1406 narqiz1406 Ответ:a)x=7;y=5b)x=4;y=2Пошаговое объяснение:a)2x=14. x=7 7-y=2y=5b) 3x=12x=44-y=2y=2

Answer 1

Solution for Equation Set A:

To solve the equation set A, let's start by adding the two equations together:

x + y = 12 (Equation 1) x - y = 2 (Equation 2)

Adding Equation 1 and Equation 2 gives us:

2x = 14

Dividing both sides of the equation by 2, we find:

x = 7

Now, let's substitute the value of x into Equation 1 to solve for y:

7 + y = 12

Subtracting 7 from both sides of the equation, we get:

y = 5

Therefore, the solution for equation set A is: x = 7 and y = 5.

Solution for Equation Set B:

To solve the equation set B, let's start by adding the two equations together:

2x + y = 10 (Equation 1) x - y = 2 (Equation 2)

Adding Equation 1 and Equation 2 gives us:

3x = 12

Dividing both sides of the equation by 3, we find:

x = 4

Now, let's substitute the value of x into Equation 2 to solve for y:

4 - y = 2

Subtracting 4 from both sides of the equation, we get:

y = 2

Therefore, the solution for equation set B is: x = 4 and y = 2.

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