Answer:
6.
a) where +3b should be - 3b.
b) -4(5a+2-3b)
c) -4(5a+2-3b)= -20a-8+12b
11.
-6(x-3)
12.
-15y-40= -5(3y+8)
-5(3y+8)= -15y-40
I really hope it helped, good luck! :)
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