# Thread: I think this belongs here??

1. ## I think this belongs here??

Hey all,

im having troubles solving an equation, and this is where i have got to with it and iam stuck:

solve for y

28.68 = (15y)(15y/15+2y)^(2/3)

ive been trying to work it out for hours! i believe the answer should be between 2.9 and 5

can anyone help?

2. Originally Posted by Gtrain
Hey all,

im having troubles solving an equation, and this is where i have got to with it and iam stuck:

solve for y

28.68 = (15y)(15y/15+2y)^(2/3)

ive been trying to work it out for hours! i believe the answer should be between 2.9 and 5

can anyone help?
Is this what you mean? $28.68 = 15y \left( \frac {15y}{15 + 2y} \right)^{ \frac {2}{3}}$

3. yes thats it

4. Only one solution.
$y\approx 15.95$

5. hmm according to what ive got it should be between the values of 2.9 and 5??

would u mind taking me through a step to step to how you got your answer?

6. Originally Posted by Gtrain
hmm according to what ive got it should be between the values of 2.9 and 5??

would u mind taking me through a step to step to how you got your answer?
actually i think the answer would be between 1 and 2

7. I made an error in the decimal point it should be,
$x\approx 1.595$

8. is it possible for someone to guide me through the steps involved?
id like to be able to work out other equations like it

9. The graph the function,

$f(x) = 15x \left( \frac{5x}{15+2x} \right)^{2/3}$

And the line $y=28.68$ and found the intersection point.

10. AHHH ok ill try take a look at that THANKS!