Hello! Im new here! And i really like this site! So heres is my problem: Well i know how to solve a simple equation with 2 incognites like: x+y=2 x+4=2y So in this case i do a substitue y=x-2 and use it in the second equation and it would be like: x+4=2(x-2) But the problem is if they only give me one equation with 2 incognites how can i solve it? Example: 3x-4y+2=2(x+1) Thanks!