Hey gang,
A little help for the mathematically challenged, if you’d be so kind.
In the equation:
(x-y)/x = 0.35
How could I solve for x?
Thanks,
Thwartme
(x-y)/x=.35
x-y=.35x
-y=.35x-x
-y=x(.35-1)
x=-y/.65
That should be your answer, some of the lines could be formatted differently, but in the end you should get a similar(well, the same) answer.
(x-y)/x = .35
x-y = .35x : multiply by x
-y = .35x -x : subtract x
y = x - .35x : invert signs
y = x (1 - .35) : factor out x
x = y / .65 : divide
WAIT, missed a negative sign.
This is the correct answer.
(x-y)/x=.35
x-y=.35x
-y=.35x-x
-y=x(.35-1)
x=-y/-.65
x=y/.65
Man, that was fast! You folks rock!
And, as a footnote, multiplying both sides of the equation by x requires the assumption that x =/ 0
How come we’re doing your homework?
That wouldn’t be a requirement of multiplication would it? As presented to us, X can’t be zero since it’s already on the bottom.
[sub]BTW Dexter, I just saw The Philidelphia Story, I always wondered what your name meant[/sub]
The thing is, (x, y) = (0, 0) is not a solution to the original equation, even though the form x = y / 0.65 would make you think it is.