# Homework solve this for me

• Nov 10th 2008, 08:34 PM
pettygaw
Homework solve this for me
Hi from quebec city, first post and i speak french so i'm not good with english math expresisons...anyway
ok i managed to get an equation, but i can't simplify it.

x*((165/(x/65000))+.05) - x = 0

Thanks alot
• Nov 10th 2008, 08:52 PM
Rapha
Hi

Quote:

Originally Posted by pettygaw
Hi from quebec city, first post and i speak french so i'm not good with english math expresisons...anyway
ok i managed to get an equation, but i can't simplify it.

x*((165/(x/65000))+.05) - x =

Thanks alot

= (165x /(x /65000)) + 0.05x - x

= 165 / (1/65000) + 0.05x - x

= 165*65000 -0.95x = 0

$x = \frac{165*65000}{0.95}$
• Nov 10th 2008, 09:04 PM
pettygaw
rapha i hope you are still there, i made a mistake, my equation is

x*((165/(x/65000))+.05) = y
i need to find that y but i don't know how because it's in relation with my x. related to this equation, the final equation i need to solve is this:

20 475 000 + x((165/(x/65000))+.05) = x

i hope you understand me ;)
• Nov 10th 2008, 09:26 PM
Rapha
Quote:

Originally Posted by pettygaw
rapha i hope you are still there, i made a mistake, my equation is

x*((165/(x/65000))+.05) = y
i need to find that y but i don't know how because it's in relation with my x. related to this equation, the final equation i need to solve is this:

20 475 000 + x((165/(x/65000))+.05) = x

i hope you understand me

No, i do not, sorry
Quote:

x*((165/(x/65000))+.05) = y
i need to find that y

What do you mean?
x*((165/(x/65000))+.05) = 0.05*x + [165x /( x /(65000)) ]

= 0.05x + [165 / (1/65000)]

= 0.05x + 165*65000 = y

its a linear function

Quote:

20 475 000 + x((165/(x/65000))+.05) = x
why is a x on the right side? Should it be y?

I dont know
Anyway, you know x((165/(x/65000))+.05) = 0.05x + 165*65000

=> 20 475 000 + 0.05x + 165*65000 = x

=> 20 475 000 + 0.05x-x + 165*65000 = 0

...

=> x = ???