SOLUTION: I already have an answer to this, but just want to make sure I did it right. The problem is cubed root of x - 5=3. I came up with 512. The cubed root of 512 is 8. When I check my w

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: I already have an answer to this, but just want to make sure I did it right. The problem is cubed root of x - 5=3. I came up with 512. The cubed root of 512 is 8. When I check my w      Log On


   

Question 205763: I already have an answer to this, but just want to make sure I did it right. The problem is cubed root of x - 5=3. I came up with 512. The cubed root of 512 is 8. When I check my work and put 8 in for x, it's the cubed root of 512=8-5=3. Am I right? I am not sure how to write it out for you on the computer. I hope you understand the problem. Thanks.
Found 2 solutions by Alan3354, Earlsdon:
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
I already have an answer to this, but just want to make sure I did it right. The problem is cubed root of x - 5=3. I came up with 512. The cubed root of 512 is 8. When I check my work and put 8 in for x, it's the cubed root of 512=8-5=3. Am I right? I am not sure how to write it out for you on the computer. I hope you understand the problem.
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If it's
cube root(x) - 5 = 3, then your answer is right.
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If it's
cube root (x-5) = 3
then
x-5 = 27
x = 32

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
You did well!
%28x%29%5E%281%2F3%29+-+5+=+3 Add 5 to both sides.
x%5E%281%2F3%29+=+8 Raise both sides to the third power.
%28x%5E%281%2F3%29%29%5E3+=+8%5E3 Evaluate.
highlight%28x+=+512%29