Set the equations equal to each other. Then, subtract 10x from 10x and 10x from 13x. You now have -25=3x-55. Add 55 to both sides. You now have 30=3x. Divide 3 from both sides. X equals 10. Now find y. Take one of the equations and substitute x in. Do y=10(10)-25. Your y is 75.
