The answer is 1 19/25
Hope this helps!
X=64 how you not know that?
X=21
-10x= -210
------- -------
-10 -10
X= 21
The line under the -10x and -210 is a division line you would divide -10x by -10 which would cancel out the -10 and divide -210 by -10 which when you divide a negative by a negative you would get a positive which leaves you with 21.
see the attached picture: