Answer:
it like the Same question I asked and I told u to draw a graph then solve
8x +9 = 6x + 21 where x = number of chairs in each row
2x=12
x=6
sub back into original equation 8 x 6 + 9 =57 chairs
Answer: 6. d
7. b
8. d
9. c
Step-by-step explanation:
Answer:
It subtracts
Step-by-step explanation: