Answer :
Alright so because there are no brackets around the 10+3 then your coefficient on the brackets is 3
so times everything inside your brackets by 3
3 x 2v=6v
-3 x 3=-9
10-9+6v now simplify
6v+1 DONE!
so times everything inside your brackets by 3
3 x 2v=6v
-3 x 3=-9
10-9+6v now simplify
6v+1 DONE!