2y+3k=5u

2u+4y=3k

3k=ux

x = ?

Thanks Best regards

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- Oct 15th 2012, 03:40 PMblackjack21An Equation with 4 variable
2y+3k=5u

2u+4y=3k

3k=ux

x = ?

Thanks Best regards - Oct 15th 2012, 04:37 PMSorobanRe: An Equation with 4 variable
Hello, blackjack21!

Quote:

From [1]: .

From [2]: .

Equate [4] and [5]: .

. . .

Substitute into [3]: .

Divide by

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

After dividing by , I had to consider: what if

Then equation [6] says:

And equation [3] becomes: .

. . which is true forvalue of*any*

I suppose that counts as another solution.

- Oct 15th 2012, 04:49 PMblackjack21Re: An Equation with 4 variable
thank you so much for your explanatory answer and Best regards