You just divide each side of the equation by three so you'll get

Edit: I believe you wrote the equation wrongly. If it was

, then you cubic root both sides and get

.
Hi
2n³ + 4n² - 7 + (-n³ - 8n - 2) = 2n³ - n³ + 4n² - 8n - 7 - 2
n³ + 4n² - 8n - 9
Answer: n³ + 4n² - 8n - 9
Ok so for #18 8(x+5)-4(x+4)
you take 8X1x and 8x5
Answer:
75
Step-by-step explanation:
if u follow 1 from the bottom line straight up, u will get 75
Answer:
8 times 5 is 40
8 plus 32 is 40
21 divided by 3 is 7
21 minus 14 is 7
E makes no sense becayse you cant multiply 21 by anything to get 7
Step-by-step explanation: