Question 714344
3y-x=5



3(2x-5)-x=5 ... plug in y = 2x-5 (ie replace y with 2x-5, we can do this because y and 2x-5 are the same)



6x - 15 - x  = 5



5x - 15 = 5


I'll let you finish. You need to solve that equation for x. Once you have x, you can use that value of x, along with y = 2x - 5, to find y.