Posted by robbie on .
can someone help in finding the ordered pair for this equation.
7x9y=63
9y7x=63

mat/116 
Henry,
7X  9Y = 63
7X + 9Y = 63
m1 = A/B = 7 / 9 = 7/9.
m2 = 7/9.
m1 = m2 = 7/9.
Threfore, the lines are parallel and
has no solution. Solve the Eqs and
you'll get 0 = 0. 
mat/116 
MathMate,
Put it in another way, the lines are coincident and parallel, so they are consistent and we have an infinite number of solutions (at every point where the two lines overlap).
Given:
7X9Y=63
Let t be any real number equal to X, then
X=t
Y=(7t63)/9
where ∞<t<∞ 
mat/116 
Henry,
So if we multiply the 2nd Eq by 1, we'll notice that the 2 Eqs are exactly identicak.
Thanks!