Let the blank space be x. So we have the following
[tex]3+7+2=x+2[/tex]The main purpose is to find the value of x by applying mathematical operations on both sides of the equality sign.
First, we add the numbers on the left hand side. So we get
[tex]3+7+2=12=x+2[/tex]Now, we subtract 2 on both sides, so we get
[tex]x=12\text{ -2=10}[/tex]So, the value of x that makes the equation true is x=10. That is, option C
