Answer:
[tex]\sf\boxed{a=6}}}[/tex]
Step-by-step explanation:
Isolate the term of a from one side of the equation.
14/21=a/9
Use cross products.
[tex]\sf{14*9=21*a}[/tex]
Solve by a.
[tex]A=\dfrac{14*9}{21}=\dfrac{126}{21}=\boxed{\sf{6}}[/tex]
a=6
So, the final answer is a=6.
I hope this helps! Let me know if my answer is wrong or not.
