20+8y-9y-21 = -y-1
Now check the others:
2(10+4y-7y-19)
= 2(-3y-9)
= -6y-18
Nope
and so on
Hint: try grouping for #D
20+8y-9y-21
which expression is equivalent?
A.2(10+4y-7y-19)
B.2(10+4y)-3(y-7)
C.4(5+2y-5y-17)
D.4(5+2y)-3(3y+7)
4 answers
D.4(5+2y-3(3y+7)
My answer is B.
i got D for sure because im smart like that