So what you have to do here is simplify the fraction 51/2 into a whole number with a decimal. 51/2 will be 25.5 in number form, so you can plug that in:
1/4n + 5 = 25.5
Then subtract 5 from both sides to get n's number by itself:
1/4n = 20.5
At this point, you would multiply the denominator of 1/4 to both sides, which would be 4. So do that now and you will see that:
