If you were to round it upwards, it would be 12. :)
X is the variable
its possible values are the domain of the expression
So what exactly is your question
Answer:
y=5
Step-by-step explanation:
I am pretty sure that is the answer but dont rely completely on me
Let the number be x.
First student increased the number by 23, therefore
⇒ x + 23
Second student decreased the number by 1, therefore
⇒ x - 1
The first student's result was 7 times greater than the result of the second student's, therefore
⇒ x + 23 = 7(x - 1)
----------------------------------------------
Solve for x:
----------------------------------------------
x + 23 = 7( x- 1)
x + 23 = 7x - 7
6x = 30
x = 5
--------------------------------------------------------------------------------------------
Answer: The number on the board is 5.
--------------------------------------------------------------------------------------------