I need help whats y= blank x+ blank

What is 20+(5 x 2/5 )+ 3 show your work

Determine the fraction of total interest owed. after the fourth month of a 12-month loan: the numerator is: {(n + ) + (n + ) + (n + ) + (n + )} = , and the denominator is: {(n) + (n + 1) + + (n + )} = . therefore, the fraction is numerator/denominator (to the nearest tenth) =

Solve for n? [tex]z = \frac{3}{4} mn[/tex]