Answer
$\{(1,2)\}$
Work Step by Step
1. Multiply 12 to the first equation to get $3x-4y=-5$
2. Multiply 20 to the first equation to get $2x+4y=10$
3. Add the above results to get $5x=5$, thus $x=1$
4. We have $3(1)-4y=-5$, thus $y=2$
5. Thus the solution set is $\{(1,2)\}$
