Answer:
[tex](C) \dfrac{a}{6}=420[/tex]
Step-by-step explanation:
The multiplication property states that:
If a=b, then a*c=b*c
Out of the given options, [tex]\dfrac{a}{6}=420[/tex] requires the multiplication property of equality to be solved.
That is:
[tex]If \: \dfrac{a}{6}=420\\\\\dfrac{a}{6}X6=420X6\\\\a=2520[/tex]
