[tex]\Large\boxed{\tt Answer:~2(5a+3b+3c)}[/tex]
[tex]\tt Step-by-step~explanation:[/tex]
You cannot simplify this expression, but instead, you can factor it like this:
Find the Greatest Common Factor (GCF) of the three numbers.
[tex]\tt 10 \div 5=2\\6 \div 3 = 2\\6 \div 3 = 2\\GCF=2[/tex]
Since the GCF is 2, we can factor 10, 6, and 6 by dividing them by two and placing them inside parenthesis.
[tex]\tt 2(5a+3b+3c)[/tex]
When you multiply 2 to each of the terms, you would end up with 10a + 6b + 6c.