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C1 Homework

Hi

Can someone help me with the following question as stuck on it..

Given that 4x = 85- x, find the value of x.Thanks
Original post by ukheman
Hi

Can someone help me with the following question as stuck on it..

Given that 4x = 85- x, find the value of x.Thanks


You sure this is C1? cos this looks like logs to me
Reply 2
Original post by ukheman
Hi

Can someone help me with the following question as stuck on it..

Given that 4x = 85- x, find the value of x.Thanks



4 is 2 squared and 8 is two cubed so...
2^2x = 2^3(5-x)
therefore 2x = 3(5-x)
2x=15-3x
5x=15
x=3
Lazuli - full solutions aren't allowed on here - how does it help the OP?
(edited 8 years ago)
Reply 4
Original post by Muttley79
Lazuli - full solutions aren't allowed on here - how does it help the OP?


was not aware of that - not the first full solution I've seen so...

usually when someone asks for help I tend to give it, but I'll just give the answer next time :-)
Original post by lazuli
was not aware of that - not the first full solution I've seen so...

usually when someone asks for help I tend to give it, but I'll just give the answer next time :-)


It's better to give a hint :smile:
Reply 6
thanks

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