Answer:
n = [tex]\frac{1}{5}[/tex]
Step-by-step explanation:
Given
[tex]\frac{5}{12}[/tex] n + [tex]\frac{2}{3}[/tex] = [tex]\frac{3}{4}[/tex]
Multiply through by 12 to clear the fractions
5n + 8 = 9 ( subtract 8 from both sides )
5n = 1 ( divide both sides by 5 )
n = [tex]\frac{1}{5}[/tex]