Question

4) [15x+11y-47 = 0 5x - y = -17​

Answer 1

Ответ:

Пошаговое объяснение:

-15x+3y-51+15x+11y-47=0,

14y-98=0

14y=98 => y=7.

нужно подставить найденный игрек во второе уравнение:

5x-7+17=0 =>5x

5x=-10 =>

x=-2. Ответ: (-2; 7).

Answer 2

To solve the system of equations:

1. 15x + 11y - 47 = 0
2. 5x - y = -17

We can use either the substitution method or the elimination method. Let's solve it using the elimination method:

First, we will multiply the second equation by 11 to make the coefficients of y in both equations the same. This will allow us to eliminate y when we add the equations together.

1. 15x + 11y - 47 = 0
2. 55x - 11y = -187

Adding the equations:

(15x + 11y) + (55x - 11y) - 47 = 0 - 187

This simplifies to:

70x - 47 = -187

Now, let's solve for x:

70x = -187 + 47 70x = -140 x = -140/70 x = -2

Now that we have the value of x, we can substitute it back into one of the original equations to solve for y. Let's use the second equation:

5x - y = -17

Substituting x = -2:

5(-2) - y = -17 -10 - y = -17 -y = -17 + 10 -y = -7 y = 7

Therefore, the solution to the system of equations is x = -2 and y = 7.