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# C4 - Solving Differentials

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1. When solving a diffrenential equation such as this one:

I solved it by rearranging it to:

1/75 (dt) = 1/(4-5h) (dh)
but the markscheme solves it with this rearrangment:

1 (dt) = 75/(4-5h) (dh)

My question is, how do I know where the constants go? Why is the '75' with the dh side and why can't I have it on the dt side?
2. (Original post by SirRaza97)
When solving a diffrenential equation such as this one:

I solved it by rearranging it to:

1/75 (dt) = 1/(4-5h) (dh)
but the markscheme solves it with this rearrangment:

1 (dt) = 75/(4-5h) (dh)

My question is, how do I know where the constants go? Why is the '75' with the dh side and why can't I have it on the dt side?
It makes no difference where the constants go. Do it as you please!
3. (Original post by Gregorius)
It makes no difference where the constants go. Do it as you please!
But when I try to find t when h = 0.5 then I get the wrong answer?

EDIT: I figured out why now haha. Thanks for the help anyways

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