Fill in the blank to make the equation true.
13*5*13*___*3 = 13*17
So to start, lets take the blank space as x.
13*5*13x*3=13*17
Next, lets simplify the equation
2535x=221
dividing 2535 by both sides we now get
x=221/2535
This can be simplifed to be
x= 17/195.
17/195 is the answer.