Question

1) 7x + 2y = 9,5x + 2y = 11​

Answer 1

Ответ:

Если это нужно решить, как уравнение то вот решение :

Пошаговое объяснение:

7х + 2у = 9

7х = 9 - 2у

х = 9/7 - 2/7у

х = 9/7 - 2/7у, у € R

5х + 2у = 11

5х = 11 - 2у

х = 11/5 - 2/5у

х = 11/5 - 2/5у, у€R

Answer 2

To solve the system of equations:

1. 7x + 2y = 9
2. 5x + 2y = 11

We'll use either substitution or elimination method to find the values of x and y.

Let's use the elimination method:

First, we'll multiply the second equation by -1 to make the y coefficients cancel when we add the equations.

Original equations:

1. 7x + 2y = 9
2. 5x + 2y = 11

Now, multiply the second equation by -1: -5x - 2y = -11

Now, add the equations: 7x + 2y + (-5x) - 2y = 9 - 11 (7x - 5x) + (2y - 2y) = -2 2x = -2 x = -1

Now that we have x, we can substitute it back into either equation to solve for y. Let's use the first equation:

7(-1) + 2y = 9 -7 + 2y = 9 2y = 9 + 7 2y = 16 y = 8

So the solution to the system of equations is: x = -1 y = 8