You can put this solution on YOUR website! x/4 - y/3=5/12
x/4+y/3=-11/12
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A) 3x-4y=5 multiply both sides times 12
B) 3x+4y=-11 multiply both sides times 12
-----------add
6x====-6
x=-1 divide each side by six
-3-4y=5 substitute -1 for x in equation A)
-4y=8 add 3 to both sides.
y=-2 divide each side by -4
I'll leave the checking up to you.
Ed