4a:a+6= 4a:a+6= 4a:a+6=
We rewrite the division exercise as a fraction:
4aa+6= \frac{4a}{a}+6= a4a+6=
We simplify a in both the numerator and denominator, and we obtain:
4+6=10 4+6=10 4+6=10
10 10 10