You can put this solution on YOUR website! x-3y=7
2x-5y=13
solve by substitution
-------------
Solve the 1st for "x":
x = 3y+7
Substitute that into the 2nd to get:
2(3y+7) - 5y = 13
y = -1
------------
Substitute into x = 3y+7 to solve for "y":
x = 3*-1+7
x = 4
-------------
Cheers,
Stan H.