Answer:
y = 12
Step-by-step explanation:
proportions can be solved by cross-multiplying
to work with smaller numbers, you can simplify [tex]\frac{14}{10}[/tex] to be [tex]\frac{7}{5}[/tex]
[tex]\frac{7}{5}[/tex] = [tex]\frac{y+9}{15}[/tex]
7(15) = 5(y + 9)
105 = 5y + 45
60 = 5y
y = 12
