On Mon, 12 Jan 2009 17:03:16 +0300, Björn Helgason <[email protected]> wrote:
> I was helping my little daughter with algebra and one of the problems > was to > figure out x and y from following > > 3x+5y=570 > 5x+3y=470 > > Actually x was apples and y bananas > > Anyway I am thinking is there a way to stick this here above into J to > figure out x and why? > > The solution is straight forward enough > > 2y=100+2x > y=50+x > 5x+150+3x=470 > 8x=320 > x=40 > y=90 > > But how to do it in J A=:2 2$3 5 5 3 B=:570 470 B (+/ .*) %.A ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
