Hi Jennifer,
In your first equation
^{2}/_{n} + 4 = 10  ^{4}/_{3n}
I would first eliminate the fractions. You can do this by multiplying both sides by 3n to get
3n ( ^{2}/_{n} + 4) = 3n (10  ^{4}/_{3n} )
3n
^{2}/_{n} + 3n 4 = 3n 10  3n ^{4}/_{3n}
6 + 12
n = 30 n  4
Thus
10 = 18 n
n = ^{10}/_{18} = ^{5}/_{9}
For the second problem multiply through the 5 on the right side, and then multiply both sides by 4 to clear the fractions.
Penny
