The number in question is 7.5
Step-by-step explanation:
15 ÷ 2 = 7.5
Why divide by 2? Because dividing by 2 is the <u>inverse</u> of multiplying by 2. To double-check our solution, just multiply 7.5 by 2... and 15!!
Answer:
-6f+10g
Step-by-step explanation:

is what is asked.
So all you need to do is a value that will result to p - 9.
x =

To isolate x we just transpose the values from the other side of the equation and do the opposite operation.
Combine like terms and just copy the terms that do not have similar expressions:
p will cancel out because p - p = 0
-6 and + 9 will come together because they are like terms: -6 + 9 = 3

does not have a pair so it will remain as is. you will be left with:

Let us check:

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

or