Question 671174
{{{9a+3(8-2a)}}}
Distribute
{{{9a + 3*8 - 3*(-2a)}}}
Combine like terms
{{{9a + 24 + 6a}}}
Factor out a 3.
{{{15a + 24}}}
{{{3(5a+8)}}}
--------------------
{{{7y+21}}}
Factor out a 7.
{{{7(y+3)}}}