Reposted - math - Ashley's other question

http://www.jiskha.com/display.cgi?id=1169164297

Posted by Ashley on Thursday, January 18, 2007 at 6:51pm.

px+qy=r 2px-qy=2r find the solution.


For Further Reading


math - bobpursley, Thursday, January 18, 2007 at 7:09pm

There are five unknowns here: p, q, r, x, y



If p, x, q, and y are unknowns, then the equation is not solvable. If p, q, and r are constants, then add the two equations
px+ qy=r
px -qy=r

adding
2px=2r
x= r/p then solve for y, which has to be zero, or q is zero.

As it is, the equation systems cannot be solved.

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