How do you solve 3x+4y=2 and x-y+6?
This is presumably meant to be simple pair of linear simultaneous equations easily solved. The problem is the second one isn't equation; let's guess about what equation was meant:
Multiplying that equation by
Adding to the first equation,
Multiplying the second equation by three:
Subtracting from the first,
Remember we had to guess the equation to start, so this might not be the exact problem the student is trying to answer.