Question

21.6 - d = 5d

Answer 1

d=3.6

Answer 2

\[21.6 - d = 5d\]
\[21.6 = 5d + d\]
\[21.6 = 6d\]
\[21.6 / 6 = d\]
\[3.6 = d\]
If you don't understand, please say so :)

Answer 3

The problem to solve is:
6 - d = 5d

First, let's work on the left hand side of your equation, the 6 - d
This means, for instance, to see if it can be simplified at all.
6-d evaluates to 6-d
So, all-in-all, the left hand side of your equation can be written as: 6-d

Now, let's work on the right hand side of your equation, the 5d
Multiply d and 5
Multiply d and 1


The d just gets copied along.

The answer is d

d

5*d evaluates to 5d

The right hand side of your equation can be written as: 5d

So with these (any) simplifications, the equation we'll set out to solve is:
6-d = 5d

Move the 6 to the right hand side by subtracting 6 from both sides, like this:
From the left hand side:
6 - 6 = 0

The answer is -d

From the right hand side:
The answer is 5d-6


Now, the equation reads:
-d = 5d-6

Move the 5d to the left hand side by subtracting 5d from both sides, like this:
From the left hand side:
-d - 5d = -6d

The answer is -6d

From the right hand side:
5d - 5d = 0

The answer is -6


Now, the equation reads:
-6d = -6
To isolate the d, we have to divide both sides of the equation by the other variables
around the d on the left side of the equation.

The last step is to divide both sides of the equation by -6 like this:
To divide d by 1


The d just gets copied along in the numerator.

The answer is d

-6d ÷ -6 = d


-6 ÷ -6 = 1

The solution to your equation is:
d = 1

Answer 4

@ayowaddupkrease kindly verify the question. Is "21." a part of the question statement, or is it the 'question number', from the paper you posted this?

Answer 5

21. is a part of the question statement. Sorry for the misunderstanding.

Answer 6

Hmm. try not to post 'question numbers' in questions here, doesn't really make sense, does it? :)