You are close, but it is not the correct answer.
1 + 2k = 5k + 7
First, since we are trying to get the variable by itself, we need to move all things to one side. Let's subtract 1 from each side.

Second, we can now subtract (7 - 1) to get 6. Let's add that into our problem and then subtract 5 from each side, still trying to get the variable by itself.

Third, subtract (2k - 5k) to get -3k. Hint the negative symbol now. If the problem were switched the other way, it would still be a positive.

Fourth, we can now divide each side by -3. This results in a fraction and also getting the variable by itself on one side of the problem. Remember the negative sign in front of the fraction since (-3) carried it.
Fifth, this is our last step. We need to simplify the fraction. Since out fraction is 6/3, which number multiples by 3 to get the answer of 6? The answer is 2, since (3 × 2 = 6). Don't forget the negative!

Answer:
Answer:
<h2><u><em>
60</em></u></h2>
Step-by-step explanation:
If 12 men are needed to run 4 machines. How many men are needed to run 20
we can solve with an equation
12 : 4 = x : 20
x = 12 * 20 : 4
x = 240 : 4
<u><em>x = 60</em></u>
<u><em>----------------------------</em></u>
check
12 : 4 = 60 : 20
3 = 3
<u><em>the answer is good</em></u>
Answer:
Hope that will help you get
Answer: The square root of a negative number can be expressed as an imaginary number.
Step-by-step explanation
No square root can be taken of a negative number within the system of real numbers because squares of all real numbers are non-negative.