4 rows because 4 times 8 equals 32, so then there are only 32 singers left. 64-32=32, and once again 4 times 8 equals 32.
Answer:
Step-by-step explanation:
In my opinion the three consecutive numbers should be 25 26 and 27
25 + 26 + 27 = 78
-4(x + 1) + 7x = 8
-4x - 4 + 7x = 8
3x - 4 = 8
3x = 8 + 4
3x = 12
x = 12/3
x = 4 <===
