You can put this solution on YOUR website! solve the system of equations and enter the solution as an ordered pair:
3x-5y=-7
9x-7y=89
...
3x-5y=-7
multiply by -3
-9x+15y=21
9x-7y=89
add
8y=110
y=110/8=13.75
3x=-7+5y=-7+5(13.75)=61.75
x=61.75/3=20.58
solution (20.58,13.75) (point of intersection)
see graph below as a visual check on answer
...
y=(3x+7)/5
y=(9x-89)/7
(