Answer:
<u>Step-by-step explanation:</u>
21ax + 10by - 35ay - 6bx
21ax - 35ay - 6bx + 10by
7a ( 3x - 5y ) - 2b ( 3x - 5y )
( 7a - 2b ) ( 3x - 5y )
I think it's 42 since 7x6=42
aaaaa
Step-by-step explanation: