Answer: a=56/15
Step-by-step explanation:
For this problems, it is important ot know how to read ratios. They can be read as fractions. Knowing this, we would use proportions to solve.
[tex]\frac{3a}{7} =\frac{8}{5}[/tex] [cross multiply]
[tex]15a=56[/tex] [divide both sides by 15]
[tex]a=\frac{56}{15}[/tex]
Now, we know that a=56/15.
