Question

39. 6х + y = 2; 2y – 5х = -30; 2х + y =?А) –7 Б) -6 B) -2 Г) 0 Д) 10​

Answer 1

Ответ:

д)10

Пошаговое объяснение:

думаю так но не точно

Answer 2

To find the value of 2x + y, you can solve the system of equations:

1. 6x + y = 2
2. 2y - 5x = -30

Let's solve this system of equations using the elimination method:

First, we can multiply equation (1) by 2 to make the coefficients of y in both equations equal:

1. 2(6x + y) = 2(2) 12x + 2y = 4

Now, we have the system of equations:

1. 12x + 2y = 4
2. 2y - 5x = -30

Next, subtract equation (2) from equation (1) to eliminate the variable y:

(12x + 2y) - (2y - 5x) = 4 - (-30)

Now, simplify:

12x + 2y - 2y + 5x = 4 + 30

Combine like terms:

17x = 34

Now, divide both sides by 17 to solve for x:

x = 34 / 17 x = 2

Now that we have found the value of x, we can substitute it back into equation (1) to find y:

6x + y = 2 6(2) + y = 2 12 + y = 2

Subtract 12 from both sides to solve for y:

y = 2 - 12 y = -10

Now, you want to find 2x + y:

2x + y = 2(2) + (-10) = 4 - 10 = -6

So, 2x + y is equal to -6, which corresponds to option Б) -6.