Question

7k+1=8k+9 пжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжжж

Answer 1

7k + 1 = 8k + 9

7k - 8k = 9 - 1

-1k = 8

k = 8 : (-1)

k = -8

- - - - - - - - - - - - - - - - - - - - - - - - - -

Проверка: 7 · (-8) + 1 = 8 · (-8) + 9

                   -56 + 1 = -64 + 9

                   - 55 = -55 - верно.

Answer 2

$7k+1=8k+9;\\7k-8k=9-1;\\-k=8;\\k=-8.\\Proverka:\\7*(-8)+1=8*(-8)+9;\\-56+1=-64+9;\\-55=-55.\\Verno.$

Answer 3

To solve the equation 7k + 1 = 8k + 9, you'll want to isolate the variable "k." Here's how you can do it step by step:

1. Start with the original equation: 7k + 1 = 8k + 9

2. Move the term with "k" from one side of the equation to the other. You can do this by subtracting 8k from both sides of the equation. This will get all the "k" terms on one side of the equation: 7k - 8k + 1 = 8k - 8k + 9

3. Simplify both sides of the equation: -k + 1 = 9

4. Now, you want to isolate "k" on one side of the equation. To do this, subtract 1 from both sides of the equation: -k + 1 - 1 = 9 - 1

5. Simplify the equation further: -k = 8

6. To find the value of "k," you need to isolate it. Since you have -k on the left side, you can multiply both sides of the equation by -1 to solve for "k": (-1) * (-k) = (-1) * 8

7. This simplifies to: k = -8

So, the solution to the equation is k = -8.