<span>Let the original number of seats in a row be x;
</span>Let the number rows be y;
( x + 3) * (y - 2 )= 72 and x * y = 72 => 72 + 3 * y - 2 * x = 72 => 3 * y = 2 * x;
=> x is divisible by 3;
1. x = 3 => y = 72 / 3 => y = 24;
2. x = 6 => y = 72 / 6 => y = 12;
3. x = 9 => y = 72 / 9 => y = 8;
4. x = 12 => y = 72 / 12 =. y = 6;
5. x = 24 =. y = 72 / 24 => y = 3;
6. x = 36 => y = 72 / 36 => y = 2;
7. x = 72 => y = 72 / 72 => y = 1;
My analysis tell me that the right answer is 9 seats in a row and 8 rows;
The original number in each row is 9.
Answer:
y=2
Step-by-step explanation:
<u>note:</u><u> </u><u>it</u><u> </u><u>only</u><u> </u><u>says</u><u> </u><u>to</u><u> </u><u>figure</u><u> </u><u>out</u><u> </u><u>y</u>
x+y+z=4
x+z+y=4
2+y=4 (since x+z=2)
y=4-2
y=2
use photomath for that that's way easier
8x^2+10x-18
The explanation is in the picture below if needed
