Option C
When
is subtracted from
then the result is 
<h3><u>Solution:</u></h3>
Given that
is subtracted from 
We have to find the result
Subtraction is a mathematical operation that tells us the difference between two numbers.
When "a" is subtracted from "b", we write in mathematical expression as "b - a"
So
is subtracted from
is written mathematically as:

<em><u>Expanding the above expression using algebraic identity:</u></em>


Multiplying the nnegative sign with terms inside bracket
<em><u>There are two simple rules to remember: </u></em>
- When you multiply a negative number by a positive number then the product is always negative.
- When you multiply two negative numbers or two positive numbers then the product is always positive.

Hence the result is: 
Answer:
x > 2 is your answer.
Step-by-step explanation:
Isolate the variable, x. Treat the > sign as an equal sign, what you do to one side, you do to the other.
First, subtract 9x & 6 from both sides.
12x (-9x) + 6 (-6) > 9x (-9x) + 12 (-6)
12x - 9x > 12 - 6
Simplify.
12x - 9x > 12 - 6
3x > 6
Isolate the variable (x). Divide 3 from both sides.
(3x)/3 > (6)/3
x > 6/3
x > 2
x > 2 is your answer.
~
Answer:
pen = 12
book = 24
Step-by-step explanation:
x = cost of pen
2x + x = 36
3x = 36
x = 12
pen = 12
book = 24