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# GCSE higher maths question help watch

1. I literally have no idea what this even is. Someone help please.

Question:
Given that 2^(3x)/2^(x-5)=2^(17)
Work out the value of x
2. Wheres the q??
3. I also have no idea what this is. What is it?
4. Sorry the website wont allow me to upload the photo for some reason
5. (Original post by _orca_)
Sorry the website wont allow me to upload the photo for some reason
Take a photo of it through the app? Or just type it up?
6. (Original post by Y11_Maths)
Take a photo of it through the app? Or just type it up?
Question is :

Given that 2^(3x)/2^(x-5)=2^(17)
Work out the value of x
7. (Original post by _orca_)
Question is :

Given that 2^(3x)/2^(x-5)=2^(17)
Work out the value of x
What do you do to powers when you are dividing? Use this fact to form an equation with involving x and you should be able to solve for x
8. (Original post by Y11_Maths)
What do you do to powers when you are dividing? Use this fact to form an equation with involving x and you should be able to solve for x
That's the part that confuses me, I really don't understand it.
9. as everything is a power of 2 you can compare the powers. when you divide numbers with powers you subtract the powers (if there is a common coefficient). this means we can say that 3x - (x-5) = 17.

3x - x +5 = 17.

You can finish the rest
10. When you divide powers you subtract them if you have the same coefficient. In this case the coefficient is 2 which means the powers of the numbers, once subtracted will equal 17

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